Monday, October 20, 2014

Orchids Eaten

I was sorely disappointed when I went back to check on the group of Spiranthes magnicamporum orchids that I found a couple of weeks ago.  A short stalk was all that was left of the largest of the flowering plants.

Evidence of browsing Whitetail Deer.  Six of the 14 blooming plants suffered this fate.  All were within a few feet of the trail that is used by me and the deer.

Other plants that were farther from the trail were left alone.

This shot was taken from the trail.  The stalk of the eaten plant is in the center foreground.  The flower spike from another plant can be seen emerging from the clump of brown grass in the upper right.  Distance between plants is about four feet.

Each of the eaten plants had a set of arrow shaped hoof prints pointed to what was left of the flower stalk.  Deer have a taste for orchids and many orchid species that were once common here, such as the Showy Orchis, have not been seen for many years.

Loss of a few flower spikes was just the first disappointment.  I had come out in hopes of witnessing insects pollinating the orchids.  In two hours of watching I didn’t see anything come near those flowers.  Before leaving the site, I fashioned a pollinating tool out of a dried grass stem to mimic what happens when a nectar seeking insect inserts its head into one of these tiny flowers.

Instead of being released as loose grains, orchid pollen is contained in a sticky mass called a pollinium that attaches itself to a nectaring insect.  If this grass stem had been the head of a bee, the pollen mass would have attached to the bee’s head.  The pollen would then be in position to pollinate future flowers visited by the bee.  I have yet to see this activity performed by a live insect.  I may just have to pack up and live with the orchids some summer.

Friday, October 17, 2014

Young Black Rat Snake

My house, barn and garage are home to many Black Rat Snakes, but until now, I’ve never seen a first year youngster.  This fine fellow gained entrance to the house when I left the door to the garage open while I carried some items out for storage.  I came in to find him scooting across the family room carpet and quickly moved to intercept.  The house is not a snake friendly environment and I would hate to find one like him dead and dried out on some future date.

Young Black Rat Snakes are often mistaken for Eastern Milk Snakes.  The Milk Snake shows a light “Y” shaped pattern surrounded by dark coloration that is clearly visible just behind the top of the head.  The Black Rat Snake has a gray “V” that blends into the gray on top of the head.

A black stripe begins behind the eye and ends when it reaches the corner of the mouth.

The back is marked by a series of dark blotches.  The coloration of the young snake bears little resemblance to that of the adult.  The pattern changes to an almost solid black as the snake grows.

Broken vertical bars mark the sides.  The body shape reminds me of a train tunnel.  Flat belly, straight vertical sides and a rounded back characterize the Black Rat Snake.

A double row of dark blotches runs down the belly. 

Overall, this is a very handsome looking snake.  The snake was quite docile, but by the time this shot was taken, it had warmed up enough that it wouldn’t stay still for any more photos.

I let the snake down into one of my growing containers to keep it confined long enough for a full body shot.  This guy is probably not more than a month old.

Then I let the snake go in a brush pile near the house.  The pile contains large rotting logs that will provide security from predators while my scent dissipates from its body.  I’ve noticed several animal species, especially dogs, that are attracted to the scent of humans.  I wonder if handling wild animals might put them at greater risk from these predators.

The snake wasted no time moving down into the pile of logs.
I may run across this snake again, but for now, that’s the end of this tail.

Wednesday, October 15, 2014

Hoppers

The diversity of active insects at Blue Jay Barrens continues to decline as we proceed into autumn.  Fortunately, one of my favorite insect groups is still well represented by active adult individuals.  I’m referring to representatives of the order Orthoptera, which I generally think of as Hoppers, because of their specially adapted hind legs capable of sending the creatures bouncing across the landscape.  The most conspicuous of this order are the grasshoppers, such as this Two-Striped Grasshopper, so named for the twin lines that run backwards from the eyes and onto the wings where they merge to form a “V”.

The Two-Striped Grasshopper is part of a group known as spurthroated grasshoppers, so named because of the protruding spike found between the front legs.  The wounds on the underside of the thorax, along with the cream colored object that appears to be an egg, suggest that this individual is infested with parasites.

In large numbers, this species is sometimes an agricultural pest.  At Blue Jay Barrens the population seems to remain in check, making this just one of many species feeding on the diversity of prairie vegetation.

Many grasshoppers employ camouflage to help avoid predation.  This Kiowa Rangeland Grasshopper illustrates how easily it can avoid detection.

Removed from its rocky background, the grasshopper displays a bright and colorful pattern.

This is a quite variable species.  A diagnostic characteristic is a double hump located atop a structure known as the pronotum, which sits like a collar directly behind the head.

The grasshopper quickly blends into its surroundings once placed back on the ground.

Displaying the art of camouflage as a leaf mimic does this Lesser Anglewing little good when it sits on the tree trunk.  Anglewings are distinguished from other similar looking insects by the bend in the upper margins of the wing along the insect’s back.

The Lesser Anglewing can be separated from its close relative the Greater Anglewing by the presence of a dark patch on its back directly behind the pronotum.

Well concealed among the Indian Grass is a Fork-Tailed Bush Katydid.  I believe I interrupted some courtship activity in my discovery of this female.  I had actually been following the sound of a singing male of the species.  The vegetation was quite thick and as I pushed aside some grass stalks in an effort to catch a glimpse of the singer, I scared him from his perch.  The female, who was positioned about six inches further up the grass blade than the male, remained long enough for me to get a couple of shots before she too left the scene.

As a youngster, I always believed that the pale looking Broad Winged Tree Cricket was suffering some illness.  I never took any home to raise in captivity, because I believed that whatever ailment they suffered, might be transferred to the healthy insects in my collection.  It was years later that I found out that this was the normal appearance of this species. 

The red coloration on the head and antenna bases is distinctive.  The transparent forewings contain an intricate veined pattern that reminds me of fine crystal.

I’m a fan of insects that are so distinctively patterned that identification is unmistakable. Unfortunately, this specimen doesn’t fall into that category.  It is one of those that is part of a group of closely related species that share common physical traits.  This is most likely a Black-Horned Tree Cricket, but I am unable to make that identification with 100 percent assurance.

This handsome young lady is a Straight-Lanced Meadow Katydid.  The long sword-like appendage trailing from the end of the abdomen is the egg laying apparatus, the ovipositor. 

I’ve been seeing a lot of these Woodland Meadow Katydids this year.  In general they all seem little disturbed by my intrusion.

After only one photograph, this inquisitive lady went from corn stalk, to camera, to my hand, where it didn’t want to leave.

It migrated to my thumb where it began nibbling away at the skin.  I wasn’t sure if it was after salt or dead skin cells or the residue of ornamental corn sap that gave my thumb that purple blush.

When it moved around to my knuckle, which had not been corn contaminated, I decided that it was most likely grazing on dead skin cells.  I had to remove it from my thumb, however, because I didn’t have time for the full manicure.

Monday, October 13, 2014

Spraying Invasives

While I’m out doing work around the property, I carry a small spray bottle of glyphosate herbicide to use on any invasive shrubs I happen across.  Most of what I find, like this Autumn Olive, is only a year or two old and less than a foot in height.
 
Occasionally, I’ll find larger specimens.  This Autumn Olive was three feet tall and growing in a place that I frequently visit. When I find something like this, I always wonder how it was overlooked earlier.

Here’s a possible explanation.  A look at the base of the plant shows evidence of its having been browsed heavily at some time in the past.  Deer often eat young Autumn Olive right down to the ground.  The plant responds by sending up new shoots. 

A few inches above ground is more sign of deer browse.  In between cuttings, the shrub increases its root mass, so regrowth is more rapid after each occurrence.  I could easily have overlooked the plant after its pruning by the deer.  It doesn’t stay hidden forever though.

A clean cut at ground level and a dab of glyphosate applied to the wound means that this shrub will not be making another comeback.  I should clarify that glyphosate was applied only to the stump.  Everything else in the photo is wet because of a rain that had just ended less than an hour earlier.

Some of the Japanese Barberry that I find is more mature than most of the other invasives of similar size.  Being a smaller statured plant, by the time it’s large enough to be easily seen, it could be old enough to produce fruit.  I’m trying hard to keep the invasive shrubs from producing fruit.  I believe that birds feeding on the fruit of invasives will spend most of their time in the vicinity of that food source and are most likely to deposit the seeds of those species in the same area.  I know that there will always be some seeds of invasive shrubs dropped within the boundaries of Blue Jay Barrens, but by denying the birds the opportunity to dine on those same fruits here, the incidence of seed drop will be reduced.

Multiflora Rose seedlings are still commonly found.  The greatest incidence of these seedlings is in areas that once supported thickets of mature rose bushes.  It may take a few years for the collection of seed in these areas to diminish.

Even if I have to deal with a scattering of seedlings each year, these sites are looking much improved over the days when they were a solid Multiflora Rose monoculture.

Large rose canes are now those of native roses.  Native rose seedlings are also becoming more numerous.

Most of the Bush Honeysuckle is small enough to be pulled root and all from the ground.  It’s becoming rare to find any of this species large enough to require a cut and spray.

I was surprised when I pulled on a small Bush Honeysuckle and came up with this previously cut stump.

I remember when this was originally cut two years ago.  A large tree limb had fallen on the shrub and forced the branches to radiate horizontally from the center.  New shoots came up from the horizontal branches as well as the center of the plant.  To assure a good kill, I levered the stump out of the ground and treated the cut roots left behind.  The stump, left on the ground, sent out new roots and began to grow anew.

I set the stump in the branches of a fallen cedar.  This will allow it to dry out and die.

Just to be sure, I cut the sprouts and gave them a shot of glyphosate.  I certainly don’t want to come out and find this thing continuing to grow.