Backyard Natural Wonders – 2022 Highlights

I love watching nature documentaries like those narrated by David Attenborough, but even more than that I love watching the natural wonders that surround me every day.

This post features a few of my favorite sightings from 2022.

A pair of Eastern Bluebirds eating berries from American Holly (Ilex opaca)

Eastern Bluebirds visit us more often in fall and winter than in spring or summer. In addition to holly berries, they love our heated birdbath, an important source of fresh water in the cold winter months.

Eastern Bluebird, Male
Eastern Bluebird, Female

I always love it when an animal reminds me of the value of plants or other habitat that humans sometimes question. The male Northern Flicker (Yellow-shafted here in New Jersey) in the photo below did just that while enjoying Poison Ivy (Toxicodendron radicans) drupes, a berry-like fruit in the woods across from our house.

Northern flicker eating Poison Ivy (Toxicodendron radicans) drupes, a berry-like fruit in the woods across from our house

Bottlebrush Buckeye (Aesculus parviflora) is a constant source of entertainment when it blooms in mid-summer, attracting butterflies, Ruby-throated Hummingbirds, Hummingbird Moths, and many different bees and other insects to visit for nectar.

Eastern Tiger Swallowtail nectaring from Bottlebrush Buckeye (Aesculus parviflora)
Dark form female Eastern Tiger Swallowtail drinking nectar from Bottlebrush Buckeye (Aesculus parviflora). She’s disguised as a Pipevine Swallowtail in an attempt to look unpalatable to potential predators such as birds.
Hummingbird Clearwing Moth nectaring from Bottlebrush Buckeye (Aesculus parviflora). Notice the ant also visiting the flowers, foraging for nectar or other insects to eat.

I understood why large long-tongued bees like Eastern Carpenter Bees visited the long, narrow, tubular flowers, but I puzzled over why so many tiny bees would buzz around the plant, since their anatomy isn’t a good fit for the flower size and shape.

Eastern Carpenter Bee drinking nectar from Bottlebrush Buckeye (Aesculus parviflora) flowers
Sweat Bee harvesting pollen from Bottlebrush Buckeye (Aesculus parviflora) flower

As I watched more closely, I saw tiny sweat bees (Halictid species) landing on the anthers (the flower part from which pollen is dispensed) to harvest pollen, both for themselves and to bring to their nests to feed their larvae. Bees and some flies may visit flowers for pollen, an important food source for them. Both their athleticism and creative thinking was impressive.

An acrobatic Sweat Bee harvesting pollen to bring to her nest to feed her larvae. Notice the pollen she has packed on her hind legs perfectly matches the color of the pollen she is harvesting.

A Sweat Bee taking an easier approach to harvesting the pollen she needs.

From a different access point, the sweat bees managed to drink nectar from the flowers, but without their bodies touching the flowers’ reproductive parts, so they weren’t likely to be doing the plant any favors in exchange for the nourishment provided.

Sweat Bee attempting to access this flower’s nectar. The bee’s body isn’t touching the flower’s reproductive parts, so it’s unlikely pollination will occur as a result of this transaction.

The starburst arrangement of abundant stamens (male reproductive parts) in the flowers of Shrubby St. Johnswort (Hypericum prolificum) are such a successful attraction to potential pollinators that this plant doesn’t waste any energy producing nectar.

Bumble Bee harvesting pollen from the profusion of anthers on a Shrubby St. Johnswort (Hypericum prolificum) flower.
Many bees are attracted to Shrubby St. Johnswort (Hypericum prolificum) for the potential of harvesting ample pollen from its flowers.

In late July I found a Striped Hairstreak in our habitat, my first time seeing this species. This butterfly was not only new for me, but it’s rare where I live in New Jersey.  What was it doing in my garden?  Striped Hairstreaks are typically found at forest edges where there are nectar sources, and with nearby access to its caterpillar foods – oaks, walnuts and hickories.  We have nectar sources, and there are suitable caterpillar food trees nearby, so check and check.  

My first ever sighting of a Striped Hairstreak, a butterfly that is rare where I live in New Jersey.

Catbirds arrived in spring and stayed through mid-fall. I saw them just about every day, usually in pairs, but sometimes in groups of four or more. Early one afternoon in August I witnessed a young Catbird being tutored on the proper way to take a bath.

Young Catbird delicately swirling the water in our birdbath, with adult supervision.
The adult Catbird coach provides guidance, saying, ‘Really get your whole body into it. Flap your wings! Don’t be afraid.’
The young Catbird gives it another shot.
“That was refreshing!”
The young Catbird, “How was that?” The adult supervisor, “Now you’ve got it!”

As Flowering Dogwood (Cornus florida), Winterberry Holly (Ilex verticillata) and Blackhaw Viburnum (Viburnum prunifolium) fruit ripened, the Catbirds were joined by migrating birds who passed through, using our habitat as a rest stop.

Catbird in fall, surrounded by ripening Flowering Dogwood (Cornus florida) fruit.
A migrating Swainson’s Thrush happily ate Winterberry Holly (Ilex verticillata) fruit.
Although surrounded by fruit, this female Purple Finch preferred to eat a caterpillar when visiting our habitat.

My favorite event was a visit from a Sleepy Orange in late September. 

Sleepy Orange (winter color form) on Virginia Creeper (Parthenocissus quinquefolia) in my New Jersey garden in late September

I love this butterfly for its pioneering ways. It’s mainly a tropical butterfly, but works to extend its range northward, positioning itself for continued survival in these days of climate change.  Instead of the southward migration strategy for winter survival employed by many insect and bird species, some Sleepy Oranges fly north in late summer and fall. I imagine them getting together, looking for volunteers to fly north, saying, “See if you can survive the winter in a place where you can find nectar for yourself and a partner, and food for the kids (caterpillars).  If you succeed, great!  We’ve extended our range. If not, no big deal, we adults will all be dead by late spring anyway.”  I’m not sure that’s what really goes on, but I like to pretend it is.

Sleepy Orange (winter color form) on Blue Wood Aster (Symphyotrichum cordifolium) in my New Jersey garden in late September

At one time the Sleepy Orange was thought to be unable to survive the winter any farther north than North Carolina. But they are now seen fairly often in central New Jersey and eastern Pennsylvania, and may have established year-round colonies.  I first encountered a Sleepy Orange in 2006 at nearby Bowman’s Hill Wildflower Preserve, but this was my first sighting of the species in my own habitat.  Very exciting!  This year I had nectar to offer this thirsty butterfly, but to extend its range it needs the food its   caterpillars require, Wild Senna (Senna Hebecarpa, S. marylandica) or Partridge Pea (Chamaecrista fasciculata). I didn’t have the necessary caterpillar food to offer this year, but we’ll have some Wild Senna by next summer.

Sleepy Orange drinking nectar from Blue Wood Aster (Symphyotrichum cordifolium)
Sleepy Orange drinking nectar from Thin-leaved Sunflower (Helianthus decapetalus)

No matter what time of year, there is always something interesting to see right outside our doors. I have my desk facing the windows so I can be easily distracted by wildlife. Even on a winter day I may see Box Elder Bugs, Chickadees, Titmice, Carolina Wrens, White-breasted Nuthatches, Juncos, White-throated Sparrows, Red-bellied Woodpeckers, Downy Woodpeckers, Robins, Bluejays, Pileated Woodpeckers, Yellow-bellied Sapsuckers, Cedar Waxwings, or Brown Creepers. Some visit for fruit, but many are gleaning insects from the branches, bark and leaves of trees and shrubs, and from the fallen leaves on the ground.

Red-tailed, Sharp-shinned and Coopers Hawks sometimes stop by. On rare occasions, a Bald Eagle does a fly-over.

Want to see more wildlife?  Make your own backyard an inviting habitat. Just provide the food birds, butterflies, bees and other animals need in the form of plants native to your region, and do less: leave fallen leaves in your planting beds, leave spent perennials standing, don’t use pesticides, herbicides or fertilizers, reduce your lawn if you can.  

You don’t need to have a large property to host and see wildlife. We live in an end unit in a townhouse development with a homeowners’ association (HOA), adjacent to commonly owned natural areas that were preserved when the development was built more than 30 years ago. (Note that we leave the leaves, standing spent perennials, and don’t use pesticides.) Even a planter or a window box can bring wildlife within view.

Why travel thousands of miles away from home to see wildlife, when you can make exciting discoveries in your own backyard?  

Chickadee foraging on Blue Wood Aster (Symphyotrichum cordifolium), looking for seeds or insects

Related Posts

Sleepy Orange Butterflies are Back

A Wildlife, Family, and Pet-friendly Lawn

‘Will Work for Food’ – Extra-floral Nectaries

Bountiful Blue Wood Aster

Shrubby St. Johnswort

Where Do Winterberries Come From?

Invasion of the Cedar Waxwings

Holiday Gift Ideas for Your Wild Neighbors

A Lovely Native Chickweed

As I rounded a bend while walking a trail on a cool day earlier this spring, I spotted a colony of wildflowers blooming a few inches above ground level. 

A colony of spring wildflowers
A colony of mystery spring wildflowers

My first thought was that it must be Spring Beauty (Claytonia virginica), whose blossoms were beginning to carpet the forest floor, but I quickly realized it must be something else. These flowers were a purer white, showing no hint of the pink nectar guides and anthers that add a bit of blush to Spring Beauty’s floral display. 

Spring Beauty (Claytonia virginica). Note the pink stripes (nectar guides) on the petals, and the pink anthers.
Spring Beauty (Claytonia virginica). Note the long, narrow leaves, the pink stripes (nectar guides) on the petals, and the pink anthers.

Clearly this was a different species. I needed to take a closer look.

Notice the upright stems with short opposite leaves, and more leaves at the base of the plant.
Notice the upright stems with short opposite leaves, and more leaves at the base of the plant.

While these plants were similar in height to Spring Beauty, they were more erect, less sprawling. Their leaves were short, opposite each other along the stem, with additional leaves at the base of the plant.

The flowers had five distinctly lobed petals, and instead of pink striping, these had soft gray nectar guides beckoning pollinators to visit.  

Notice the deeply notched white petals with soft gray striping.
Notice the deeply notched white petals with soft gray striping, characteristics of Field Chickweed (Cerastium arvense ssp. strictum).

A little investigation yielded the identification as Field Chickweed (Cerastium arvense ssp. strictum), a plant native throughout much of Canada and the United States (except Kansas, Oklahoma, Texas, Louisiana, Virginia, North Carolina, South Carolina, Alabama, and Florida).  In spite of Field Chickweed’s wide range, this was my first encounter with it.  This perennial chickweed is often found on cliffs, rocky slopes, ridges, ledges or beaches.  Fittingly, I met this small beauty on a rocky western-facing slope near the Delaware River in the Sourland Mountains in New Jersey.

Field Chickweed (Cerastium arvense ssp. strictum) with flower visitor
Field Chickweed (Cerastium arvense ssp. strictum) with flower visitor

The primary pollinators documented for this species are a number of bees, including small carpenter bees, cuckoo bees, mason bees, sweat bees, and mining bees. Conveniently located nearby were nest entrances for some ground nesting bees who may have been frequent diners at the Field Chickweed flowers.

Entrance to ground-nesting bee nest in the path to the right of some Field Chickweed (Cerastium arvense ssp. strictum).
Entrance to ground-nesting bee nest in the path to the right of some Field Chickweed (Cerastium arvense ssp. strictum).

In contrast to the documentation I found for this plant, the pollinators I encountered were all flower flies (also known as hover flies or Syrphid flies).

Field Chickweed (Cerastium arvense ssp. strictum) with flower fly actively drinking nectar
Field Chickweed (Cerastium arvense ssp. strictum) with flower fly actively drinking nectar
Field Chickweed (Cerastium arvense ssp. strictum) with visiting flower fly
Field Chickweed (Cerastium arvense ssp. strictum) with visiting flower fly
Field Chickweed (Cerastium arvense ssp. strictum) with Eastern Calligrapher (Toxomerus geminatus)
Field Chickweed (Cerastium arvense ssp. strictum) with Eastern Calligrapher (Toxomerus geminatus), a species of flower fly

Flower flies are named for their frequent visits to flowers to drink nectar and eat pollen, and for their ability to hover in the air. Flies are important pollinators, especially in spring and fall when the weather is cool, because they are able to fly at lower temperatures than many bees.   

The seeds of this and other chickweeds are eaten by many birds and small mammals, including mice.

Deer Mouse (Peromyscus maniculatus). Mice will eat chickweed seeds.
Deer Mouse (Peromyscus maniculatus). Mice will eat chickweed seeds.

Those small mammals may become food for other animals, like this Red Fox.

Red Fox, "Yum! Mice are delicious!"
Red Fox, “Yum! Mice are delicious!”

Field Chickweed is a lovely little native plant quietly doing its job in the ecosystem. I’m happy to have made its acquaintance.

Field Chickweed (Cerastium arvense ssp. strictum)
Field Chickweed (Cerastium arvense ssp. strictum)

Related Posts:

A Tale of Two Spring Beauties

Resources

Eaton, Eric R.; Kauffman, Ken.  Kaufman Field Guide to Insects of North America.  2007.

Skevington, Jeffrey H.; Locke, Michelle M.; Young, Andrew D.; Moran, Kevin; Crins, William J.; Marshall, Stephen A.  Field guide to the Flower Flies of Northeastern North America. 2019.

Flora of North America

Go Botany

Illinois Wildflowers

Lady Bird Johnson Wildflower Center Plant Database

USDA NRCS Plant Database

USDA U.S. Forest Service Plant of the Week

Why Leave the Leaves?  Ask a Red-banded Hairstreak!

Thinking about doing a fall clean-up in your garden?  Maybe you are planning to remove the layer of naturally fallen leaves that are beginning to blanket your planting beds?

I hope my encounter with a Red-banded Hairstreak will prompt you to change your plans.

On a recent walk on a woodland trail near my home in central New Jersey, I had just turned around to head back to my car when I noticed a flutter of brownish wings at ground level at the edge of the trail. My first thought was that it was probably a moth, but when I saw the insect in profile, I could tell it was a butterfly. As I looked more closely, I saw the tell-tale markings of a Red-banded Hairstreak.  I decided to watch for a while.

A Red-banded Hairstreak walking on the forest floor
A Red-banded Hairstreak walking on the forest floor

She stayed on the ground, walking over obstacles that seemed like they would be a challenge for someone her size, especially when she could choose to fly. While I observed her, she climbed over leaves, rocks, leaf stems and small branches, never once taking to the air.  Several times she paused in place for a few seconds.  Was she just resting, or maybe getting her bearings? No! She had a purpose in mind.

The Red-banded Hairstreak pauses.  Wait! Is she laying an egg?
The Red-banded Hairstreak pauses. Wait! Is she laying an egg?
No question this time! This Red-banded Hairstreak is laying an egg. Her curved abdomen is the tell-tale sign.
No question this time! This Red-banded Hairstreak is ovipositing (laying an egg). Her curved abdomen is the tell-tale sign.

Red-banded Hairstreak caterpillars eat fallen leaves and other decaying plant matter.  This little female was laying eggs on or near the kinds of material that her caterpillars would need to eat when they hatched. She alternated walking for a bit with brief pauses to lay an egg.

She walks on, over leaves and twigs.
She continues walking, over leaves and twigs.
Our Red-banded Hairstreak pauses at another promising spot to lay an egg.
Our Red-banded Hairstreak pauses at another promising spot to lay an egg.
She walks on over rocks . . .
She walks on over rocks . . .
She walks over twigs until she pauses one more time to lay an egg on detritus
She walks over twigs until she pauses one more time to lay an egg on detritus

After nearly five minutes, she flew off, presumably scouting for another promising location to lay more eggs.

The caterpillars that hatched from her eggs will spend the winter snug in the fallen leaves, waiting for warm spring days to arrive before completing their metamorphosis to become the next generation of Red-banded Hairstreaks.

Since my encounter with the Red-banded Hairstreak in the woods, I’ve seen other individuals in my own shade garden several times.  Fortunately for them and for me, I leave the fallen leaves undisturbed in the garden. I recommend you do the same!

Red-banded Hairstreak on White Wood Aster (Eurybia divaricata) in our shade garden
Red-banded Hairstreak on White Wood Aster (Eurybia divaricata) in our shade garden

American Cranberrybush

American Cranberrybush  (Viburnum opulus var. americanum synonym V. trilobum), also called Highbush Cranberry, Cranberrybush Viburnum, and several other common names, is not the source of the cranberries often served for Thanksgiving dinner.  Those cranberries come from an unrelated species, Cranberry (Vaccinium macrocarpon), a member of the heath family, and a plant that is more closely related to blueberries than it is to American Cranberrybush.

American Cranberrybush (Viburnum opulus var. americanum) fruit

American Cranberrybush gets its common name from the color of its bright red fruit, which does resemble the cranberries so often used to make holiday side dishes or to garnish a salad.  The common name Highbush Cranberry refers to this shrub’s height, which can be in the range of 8 to 12 feet (2.5 – 3.6 meters), much taller than the species that yield fruit for those traditional dishes.

This lovely shrub blooms in spring, usually some time in May.  Its floral display consists of two types of flowers arranged in a large rounded cluster, creating a lace-cap effect.  Large white sterile flowers form the perimeter of the flower cluster, surrounding a dense group of much smaller fertile flowers that make up most of the inflorescence.  The job of the sterile flowers is to be showy enough to attract potential pollinators to the fertile flowers, where the work of reproduction is carried out.  This floral strategy is shared by Hobblebush Viburnum (Viburnum lantanoides, synonym V. alnifolia) and some of the hydrangeas.

The sterile perimeter flowers bloom first.

American Cranberrybush (Viburnum opulus var. americanum) flower cluster. The large sterile flowers around the perimeter are in bloom, while the fertile flowers are still in bud.

Then gradually, the fertile flowers open for business, enticing pollinators to visit, including many flies, bees and beetles, all important pollinators.

American Cranberrybush (Viburnum opulus var. americanum) flower clusters. Many of the small fertile flowers in the center of the inflorescences are in bloom, in addition to the sterile flowers around the perimeter. If you look closely at the top cluster, you can see a fly (a potential pollinator) foraging for nectar and pollen.
Foraging Mining Bee (Andrena sp.) on blooming American Cranberrybush (Viburnum opulus var. americanum) flowers.
Mining Bee (Andrena sp.) and another tiny pollinator a bit above and to her right, on blooming American Cranberrybush (Viburnum opulus var. americanum) flowers.

Spring Azure butterflies use the flowers and buds of this and other spring-blooming viburnums, and a few other woody species as food for their caterpillars. 

Spring Azure butterfly

Hummingbird Clearwing and several other moth species also use this and other viburnums as food for their caterpillars.

Hummingbird Clearwing (Hemaris thysbe) moth

American Cranberrybush leaves have three lobes, resembling the leaves of Red Maple (Acer rubrum). To protect itself from hungry marauding caterpillars, American Cranberrybush has glands on its leaf stems just below where the stem meets the leaf blade. These glands are extra-floral nectaries, designed to lure insects that can be enticed by both a sweet nectar treat and the protein available from a caterpillar. Ants, wasps, even some flies are potential security guards that are paid for their presence with nectar from these glands, with the potential for a bonus: as many caterpillars as they can find.  Ants drink nectar and eat caterpillars and other insects. Wasps and flies drink nectar, and some also hunt caterpillars or other insects to feed their young.  The presence of these predatory insects helps protect American Cranberrybush from foraging caterpillars.

Note the bumps on the leaf stem, just below the 3-lobed leaf blade. They are the extra-floral nectaries.

American Cranberrybush is a variety of a look-alike shrub, European Cranberrybush (Viburnum opulus) which is of European origin and can become invasive in North America.  The two can interbreed, which has the undesirable potential to lead to the loss or alteration of the native variety. The best way to tell the two apart is by their extra-floral nectaries.  On American Cranberrybush, these nectaries are somewhat convex or slightly rounded at the top, while those on European Cranberrybush leaf petioles (stems) are concave.

By late June, developing fruit replaces successfully pollinated flowers, ripening as the summer goes on.  The fruit is a drupe, a fleshy fruit with a single seed encased in a stony pit. Peaches and cherries are examples of fruits that are drupes.

American Cranberrybush (Viburnum opulus var. americanum) developing fruit, late June in Pennsylvania.
American Cranberrybush (Viburnum opulus var. americanum) ripening fruit, mid-July in Pennsylvania.

American Cranberrybush fruit has a relatively low fat content, so it is less desirable for migrating birds than some other options like Spicebush (Lindera benzoin).  It often lasts well into the winter, but this year, where I live and play in central New Jersey and eastern Pennsylvania, the fruit was already gone by mid-November. Of course, we have already had a few hard freezes, followed by warm-ups.

American Cranberrybush (Viburnum opulus var. americanum) fruit, November, in Pennsylvania.

Robins, Bluebirds, Hermit Thrush, Cedar Waxwings, grouse and many more birds eat American Cranberrybush fruit. 

Cedar Waxing – they are among the birds who eat American Cranberrybush fruit.

All kinds of animals, from moose to fox to squirrels and mice also eat the fruit.

Gray squirrels and many other animals eat American Cranberrybush fruit.

What about humans?  If we get to it before our animal neighbors do, can we use this fruit as an actual cranberry substitute?  If it is cooked with sugar or other sweetener added, people find the fruit of American Cranberrybush edible, too. Some sources say that fruit from European Cranberrybush tends to be more bitter.

Look for American Cranberrybush in wet woods or along streams in its native range, from Nova Scotia to British Columbia in Canada, and in the United States from Maine to Washington state, south to New Jersey, West Virginia and Illinois, although it is more common in the eastern US. The USDA also shows it in one county in New Mexico.

Happy Thanksgiving!  Enjoy those cranberries!

American Cranberrybush (Viburnum opulus var. americanum) fruit

Related Posts

Time for Cranberries!

Praying for Spring? So is Hobblebush Viburnum

‘Will Work for Food’ – Extra-floral Nectaries

Partridge Pea Puzzles

Resources

Beadle, David; Leckie, Seabrooke. Peterson Field Guide to Moths of Northeastern North America. 2012.

Cech, Rick; Tudor, Guy.  Butterflies of the East Coast.  2005.

Eastman, John.  The Book of Forest and Thicket.  1992.

Levine, Carol. A Guide to Wildflowers in Winter. 1995.

Peterson, Lee Allen.  A Field Guide to Edible Wild Plants of Eastern and Central North America. 1977.

Illinois Wildflowers

USDA NRCS Plant Database

USDA NRCS Plant Guide

Missouri Botanical Garden Plant Finder

Downy Skullcap and the Amorous Skippers

Apparently I planted some Downy Skullcap (Scutellaria incana) in our garden last year and then promptly forgot, so it was a delightful surprise when the vivid blue flowers began to bloom in long stalks above gray-green foliage.

Downy Skullcap (Scutellaria incana) with Flower (Syrphid) Fly

Downy Skullcap (Scutellaria incana) with Flower (Syrphid) Fly

Each long tubular flower has an entrance with a hood- or cap-like overhang at the top, and a floor with a white pathway beckoning to visitors who might help pollinate the flowers.

Downy Skullcap (Scutellaria incana) Flower

Downy Skullcap (Scutellaria incana) Flower

The almost sapphire blue flowers are especially attractive to bees, and are thought to be most often pollinated by Bumble Bees (Bombus species) but they entice other pollinators as well, including flower flies, bee flies, and small butterflies.

I watched for visitors to the flowers in our garden and at another near-by site, Bowman’s Hill Wildflower Preserve. At both locations, bees were the most frequent visitors on days when I checked, and of the bees, Small Carpenter Bees (Ceratina species) were the most common.

Downy Skullcap (Scutellaria incana) with Small Carpenter Bee (Ceratina species)

Downy Skullcap (Scutellaria incana) with Small Carpenter Bee (Ceratina species)

Don’t be put off by the fact that they are called carpenter bees.  These tiny bees won’t be drilling holes in the deck, siding or wood trim of your home.  They nest in the stems of dead or broken twigs, excavating nesting cells by chewing through the pith, the softer tissue inside the stem.  Small Carpenter Bees are pollinators of many plants, especially those with small flowers.

Each bee crawled inside the flower, disappearing down the throat until they reached the nectar reward at the bottom.

Downy Skullcap (Scutellaria incana) with Small Carpenter Bee (Ceratina species) crawling down the throat of the flower to reach the nectar reward

Downy Skullcap (Scutellaria incana) with Small Carpenter Bee (Ceratina species) crawling down the throat of the flower to reach the nectar reward

But it wasn’t just nectar they were after.  Bees need a balanced diet.  They wanted pollen, too, for the protein and lipids it provides.  The flowers’ reproductive parts, the stamens and pistils, are hidden under the hood at their entrance.  After emerging from drinking nectar at the depths of a flower, each bee then checked under the hood for pollen, which is dispersed from the anthers at the stamens’ tips.  Some bees even went straight for the pollen without bothering with the nectar.  Hopefully some of that pollen was later deposited on the stigma of another flower, the female flower part where pollen must be placed in order for pollination to occur.

Downy Skullcap (Scutellaria incana) with Small Carpenter Bee (Ceratina species) emerging from the flower

Downy Skullcap (Scutellaria incana) with Small Carpenter Bee (Ceratina species) emerging from the flower

Downy Skullcap (Scutellaria incana) with Small Carpenter Bee (Ceratina species) harvesting pollen

Downy Skullcap (Scutellaria incana) with Small Carpenter Bee (Ceratina species) harvesting pollen

Much larger relatives of these tiny bees, Eastern Carpenter Bees (Xylocopa virginica), also visited the flowers.  Although these bees can be excellent pollinators, it pains me to tell you that in the case of Downy Skullcap, Eastern Carpenter Bees are thieves. They can’t access the flowers’ nectar by going through the inviting entrance, thus interacting with the flowers’ reproductive parts and helping with pollination.  So instead, they bite through the floral tube near its base, directly accessing the nectar, doing nothing in return to assist the plant in its reproductive goals.  Interestingly, a Honey Bee tried to discourage the Eastern Carpenter Bees from this dishonest activity by trying to chase them away, with some success. And yes, regrettably, Eastern Carpenter Bees might choose to nest in the wood of your home.

Downy Skullcap (Scutellaria incana) with Eastern Carpenter Bees (Xylocopa virginica) robbing the flower of nectar by biting through the floral tube to drink it.

Downy Skullcap (Scutellaria incana) with Eastern Carpenter Bees (Xylocopa virginica) robbing the flower of nectar by biting through the floral tube to drink it.

While looking for Downy Skullcap flower visitors in our garden, I spotted a male Zabulon Skipper drinking nectar.

Male Zabulon Skipper drinking nectar from a Downy Skullcap (Scutellaria incana) flower

Male Zabulon Skipper drinking nectar from a Downy Skullcap (Scutellaria incana) flower

A moment later, I noticed a female Zabulon Skipper, doing the same.

Female Zabulon Skipper drinking nectar from a Downy Skullcap (Scutellaria incana) flower. Notice the bee disappearing into the flower above hers.

Female Zabulon Skipper drinking nectar from a Downy Skullcap (Scutellaria incana) flower. Notice the bee disappearing into the flower above hers.

Then the male flew over to the female and suggested a ‘hook up’.

Female (top) and male (bottom) Zabulon Skippers, negotiating a hook up. Their wings are a little out of focus because both were vibrating them energetically as a lead up to an agreement.

Female (top) and male (bottom) Zabulon Skippers, negotiating a hook up. Their wings are a little out of focus because both were vibrating them energetically as a lead-up to an agreement.

She was apparently persuaded by his pitch.  They went off to a more secluded spot, and stayed there beyond the limits of my attention span.

Zabulon Skippers, mating

Zabulon Skippers, mating

Zabulon Skippers, mating

Zabulon Skippers, mating

These small butterflies are common in gardens and natural areas, specializing on many grass species as food for their caterpillars, including Purpletop (Tridens flavus), Purple Love Grass (Eragrostis spectabilis), and other related species.

Purpletop (Tridens flavus), a caterpillar food for Zabulon Skippers

Purpletop (Tridens flavus), a caterpillar food for Zabulon Skippers

When the flowers have finished blooming and drop away, a cap-shaped calyx, the set of sepals that act as bud scales remains, providing the inspiration for the common name ‘skullcap’.

Cap or dish like calyxes of Downy Skullcap (Scutellaria incana)

Cap- or dish-like calyxes of Downy Skullcap (Scutellaria incana)

‘Downy’ in the common name and ‘incana’ in the scientific name, which means hoary or quite gray, refer to the short soft hairs present on the flowers and stems of this plant. Hoary Skullcap is another common name for the species.

Downy Skullcap is native in the United States from New York west to Wisconsin, south as far as Texas and the Florida panhandle.  It can tolerate full sun to full shade, dry to moist soil. Blooming in mid-summer, it makes a dramatic addition to a garden.  Add it to yours and wait for the real drama (food foraging, bee face-offs, theft, flirtation, sex!) to begin.

Downy Skullcap (Scutellaria incana) with Small Carpenter Bee (Ceratina species)

Downy Skullcap (Scutellaria incana) with Small Carpenter Bee (Ceratina species)

Resources

Cech, Rick; Tudor, Guy.  Butterflies of the East Coast.  2005.

Eaton, Eric R.; Kauffman, Ken.  Kaufman Field Guide to Insects of North America.  2007.

Rhoads, Ann Fowler; Block, Timothy A.  The Plants of Pennsylvania.  2007

Stearn, William T. Stearn’s Dictionary of Plant Names.  1996

Willmer, Pat.  Pollination and Floral Ecology. 2011

Wilson, Joseph S.; Carril, Olivia Messinger.  The Bees in Your Backyard. 2016.

Illinois Wildflowers

Lady Bird Johnson Wildflower Center Plant Database

Missouri Botanical Garden Plant Finder

USDA NRCS Plants Database