SJF March Summary

by Carl Strang

Weather in March at St. James Farm Forest Preserve was variable, but on the whole was relatively warm with frequent rainy periods. At the beginning of the month there was a little lingering snow on the ground, and ponds were frozen, but all of this quickly was gone.

I used my old GPS unit to map my survey routes and to locate positions of previously discovered cavity trees that might harbor a great horned owl nest. One of these indeed proved to hold the nest, and the female still was present on March 25, late enough to indicate that hatched young were being brooded. Two attempts to find displaying woodcocks were unsuccessful, but during the first evening visit on March 17 I heard what I thought was a short call by a barred owl in the eastern portion of the preserve. Scott Meister reported hearing the species in the forest one evening the following week. No pileated woodpecker observations in March, but recent observations in preserves to the north along the West Branch suggest that the bird or birds seen here earlier may be wandering widely. Canada geese were down to small groups and pairs early in the month. By March 31 a nest was under incubation on the small island in the pond below the former house site.

Canada goose incubating on March 31.

Canada goose incubating on March 31.

Many killdeers were displaying in the restoration project area around the stream early in the month, but these were down to just a few individuals by month’s end. Bird activity generally increased as the season progressed, with the first cowbirds arriving March 8, a pair of hooded mergansers and 2 pairs of wood ducks present in the pond in the NW corner of the preserve for much of the month, sandhill crane flocks frequently passing overhead, a northern flicker and the first golden-crowned kinglets appearing on March 14, tree swallows on March 25, and two pairs of green-winged teals in the restored stream on March 26.

This hooded merganser pair may nest in one of the wood duck boxes at the northwest pond.

This hooded merganser pair may nest in one of the wood duck boxes at the northwest pond.

A shed antler found on March 17 in the forest near Winfield Road matched the buck photographed in the same area on November 1.

Someone found an old deer skull and propped it against a trailside tree.

Someone found an old deer skull and propped it against a trailside tree.

The first snake observed on the preserve was a midland brown snake on March 29. That same day several painted turtles were sunning in the eastern pond.

Western chorus frogs began singing on March 11, and ultimately displayed in three locations. The largest number were in the fringes of the eastern pond, and many also were in two temporary ponds in the meadow north of the entrance drive. Numbers of bullfrogs, large and small, had emerged by March 21.

One of the March 21 bullfrogs.

One of the March 21 bullfrogs.

The first butterfly of the year was a mourning cloak observed on March 21. A cabbage white appeared on March 29. The former overwinters in the adult form, the latter as a pupa. Several small brown moths were active on the forest floor on March 31. One was photographed and appears to be a tortricid, close to several similar species of Pelochrista or perhaps Eucosma.

A possible Pelochrista

A possible Pelochrista

Silver maples were blooming by March 11, and spring beauties by March 31.

Spring beauties were the first native herbaceous wildflowers to bloom at St. James Farm in 2016.

Spring beauties were the first native herbaceous wildflowers to bloom at St. James Farm in 2016.

Restoration clearing of the forest was completed by mid-March, and a new set of stakes presumably marking the new trail route was placed in the final week.

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Recent Mayslake Arthropods

by Carl Strang

Recent walks at Mayslake Forest Preserve have resulted in some photos to share, all involving Lepidoptera. The wild bergamot have been on the decline, but still were producing enough flowers to attract the attention of pollinators.

A hummingbird clearwing bellies up to the bar.

A hummingbird clearwing bellies up to the bar.

Another flower proved to be a fatal attraction to a cabbage white butterfly, which I saw curiously dangling beneath it.

The yellow flower head of the sow thistle had been a good hiding place for a crab spider. It and its prey dangled from the spider’s safety line until the butterfly was subdued.

The yellow flower head of the sow thistle had been a good hiding place for a crab spider. It and its prey dangled from the spider’s safety line until the butterfly was subdued.

Enough of the spider was hidden that I could not narrow its identity beyond being in one of two genera.

Wings may be in the future for today’s final subject.

This black swallowtail is maturing on a diet of water hemlock, a plant that is quite poisonous to humans.

This black swallowtail is maturing on a diet of water hemlock, a plant that is quite poisonous to humans.

 

Spring

by Carl Strang

By my own subjective criteria, I have to declare that spring finally arrived, with a whimper, on April 16. I wasn’t at Mayslake Forest Preserve that day to see it, but the next day was a cold one, and it was clear that a few trout lilies and spring beauties had bloomed but then closed up in the lowered temperature. The weather stayed cold then, and so it wasn’t until Monday of this week that spring was manifestly present. One of its heralds was a patch of white trout lilies.

A representative bloom.

A representative bloom.

Spring beauties were scattered in little patches across the savanna.

Pink guidelines point the way to the flower’s center.

Pink guidelines point the way to the flower’s center.

A bonus was a colony of bloodroots.

They formed a circle reminiscent of a fairy ring.

They formed a circle reminiscent of a fairy ring.

That warm day also brought the first green darner dragonfly, and mourning cloak and cabbage white butterflies. We haven’t seen the last of the cool weather, but winter appears to be done.

Early Insects

by Carl Strang

Large insects are beginning to appear at Mayslake Forest Preserve. For some weeks I have been seeing mourning cloaks, which overwintered as adults.

Mourning Cloak b

The above photo I took at Fullersburg last year. Another butterfly that overwinters as an adult is the eastern comma. This one at Mayslake apparently had a close call, probably with a bird. Note the missing section from the left hind wing.

Eastern comma b

There have been some orange sulfurs, which overwintered in the pupal stage.

Orange sulfur b

Their close relatives the cabbage whites have been common all over the preserve. Earlier  I celebrated the arrival of the first common green darner dragonflies, migrants from the South. The first locally emerging dragonfly I saw was this male common whitetail at Mayslake last week.

Common whitetail immature male b

He is recognizable to species and gender by his wing pattern, but he has newly emerged and so still has the immature coloration on his abdomen. The first mature Mayslake damselflies were eastern forktails.

Eastern forktail male b

The above photo of a mature male is from a few years ago, I believe at Songbird Slough, but this is our most common and widely distributed damselfly.

I have not had good luck photographing bumblebee queens this spring. Bombus impatiens has been common, and I saw one Bombus fervidus near the friary on May 22, at the same honeysuckle bush that hosted two of these:

Carpenter bee 2b

This is the large carpenter bee Xylocopa virginica.

The first monarch butterfly arrived at Mayslake this week.

Monarch 2009 1b

This individual is too clean to have made the trip all the way to Mexico and back. It is an offspring of those that wintered down there, made part of the journey back north, and laid their eggs on milkweed plants they found in the southwestern U.S. I shake my head in amazement at the instincts that guide these insects, with their pinhead brains, through journeys last made by their great grandparents.

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