Archive for the ‘Wild Animals’ Category

Of Butterflies and Moths

Friday, April 27th, 2012

Question Mark Butterfly (Polygonia interrogationis)

While roaming woodlands and wetlands in search of hard-shelled reptiles, the Turtle Journal Team often encounters other interesting critters along the way.  Yesterday offered us a glorious peek at a couple of intriguing moth and butterfly specimens that we’d like to share with our friends and colleagues.  In the pine-oak woodlands near the Great Blue Heron rookery, we nearly stumbled over this magnificent butterfly, which we later identified as a question mark.

Question Mark Butterfly in Marion, MA 

No, not a questionable identification.  Yes, definitely a question mark!  I feel as though I’ve fallen through the rabbit hole and find myself in an old Abbott and Costello skit.

Abbott:  “A question mark butterfly.”

Costello:  “I don’t know, you tell me the name of the butterfly.”

Abbott:  “Question mark.”

Costello:  “Yes.  What is it?”

Abbott:  “Question mark.”

Costello:  “Okay.  I give up.  You tell me.  What’s it’s name?”

Abbott:  ‘Question mark.”

And so it goes.

Giant Leopard Moth (Hypercompe scribonia) Caterpillar

On the path to the abandoned Goldwitz Bog also in Marion, Turtle Journal discovered a very large caterpiller, overwhelmingly black with orange-reddish stripes visible as it coiled into a ball when disturbed.

 Giant Leopard Moth Caterpillar in Marion, MA

Ignoring those bright warning colors, we picked up this interesting specimen to examine it closely and to get a sense of its relative size compared to other caterpillars.  Luckily for us, this species is not poisonous.

  

Giant Leopard Moth Caterpillar — Bottom Up

We also like to document the undercarriage of specimens for ease of subsequent identification.  Research confirmed that this critter is the caterpillar of a giant leopard moth.

Giant Leopard Moth Caterpillar near Abandoned Bog

We watched as the moth zigzagged through needles and leaves, occasionally burrowing under the ground cover for a peaceful interlude.

Giant Leopard Moth (from insectlove.tumblr.com)

Back at Turtle Journal headquarters, we searched the internet to find a photograph of the mature giant leopard moth.  We found this picture on insectlove.tumblr.com, but we look forward to encountering a live specimen to capture on film.  The giant leopard moth has a wingspan of three inches!

Mid-March Emergence of Juvenile Horseshoe Crabs

Monday, March 19th, 2012

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Juvenile Horseshoe Crab (Limulus polyphemus)

March madness means something entirely different to the Turtle Journal team.  Yes, it’s a culmination of a long winter of preparation.  Yes, we must keep our eyes on the ball.  And, yes; there’s an awful lot of bouncing around.  Not on basketball courts, mind you.  But at every natural habitat from wetlands to ocean.  This glorious afternoon, with full sunshine, gentle southerly breeze and mid-50s temperature, Turtle Journal ventured to the rich salt marshes of South Wellfleet to check on the emergence of juvenile horseshoe crabs; another important signpost on the road to spring.

Capture of Juvenile Horseshoe Crab

We examined the shallow marsh channels off Blackfish Creek where we usually find the emergence of the first juvenile horseshoe crabs of the year.  We had been here a week ago with no sign of activity; not even tiny fish swimming in the channels and playing hide & seek among the marsh reeds.  Yet, today we found several tracks of juvenile horseshoe crabs in the oozy bottom.  Then, almost impossible to see through the murk, a blurry mud trail betrayed the camouflaged presence of a juvenile specimen, and Don Lewis swept into action with his sampling net.

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Massing Juvenile Horseshoe Crab

This youngster tipped the scales at 26 grams with tail (telson) pointed skyward like an exclamation point! 

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Examination of Juvenile Horseshoe Crab

The anterior carapace (prosoma) measured 6.1 centimeters maximum width and 4.2 centimeter long.  The posterior (abdominal region or opisthosoma) measured 3.1 centimeters length from hindge to notch and 4.2 centimeters wide.  The spiny tail (telson) measured 4.8 centimeters.

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Juvenile Horseshoe Crab Compound Eye

Don especially delighted in the clear view of the critter’s compound eyes as illustrated in the photograph above.

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Juvenile Horseshoe Crab Ventral View

This ventral view reinforces the impression that folks have that horseshoe crabs, whether juveniles or adults, are an ancient creature; a living fossil.  When they molt, and horseshoe crabs like lobsters must molt frequently to grow, the shell splits at the leading ventral edge of the anterior carapace (prosoma), so that the animal can wiggle to freedom, then create and harden a new, larger shell.  When you find horseshoe crab shells along the beach, check for this slit to determine whether you have discovered an abandoned shell of a freshly molted individual.

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Rusty Colored Substance on Book Gills

On today’s specimen, we notice a rusty coloration on and immediately behind the book gills.

 

Release of Juvenile Horseshoe Crab

While finding the first juvenile horseshoe crab of the year is a cherished experience in our rite of spring, it is only exceeded by the joy of releasing that specimen back into the wild once it has yielded a little scientific data.  Today’s juvenile slid as gracefully as a horseshoe crab can into the marsh channel and floated down to the bottom.  After a minute or so of orientation, it wobbled forward to find the perfect spot under the marsh rim to burrow down for some peace and quiet.  Humans are, after all, strange critters that can be taken only in small doses.

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Juvenile Horseshoe Crab Ventral View

Turtle Journal confesses to finding horseshoe crabs irresistible.  During mating season, which should commence in another month or so, our wading boots get “checked out” by amorous males that get fooled by the enticing dark color and lovely rounded edges.  We’re facinated by intricate artistic designs carved on beaches by females and males locked in embrace after depositing eggs at high tide.  And there’s nothing so noble, yet comical as a juvenile horseshoe crab that stomps across your palm marching towards freedom.  Just for the record, these living fossils are darn good for the tidal ecosystem where they’re constantly tilling and aerating soil with ten walking legs and two feeding pincers.  Horseshoe crabs eggs provide the most nutrious food for migrating shorebirds, and their blue blood presents a modern medical and scientific miracle for disease detection, for thwarting bioterrorism and even for facilitating planetary exploration probes.  No wonder Turtle Journal delights in marking each spring with the arrival of the next generation of horseshoe crabs!

Slithering!

Sunday, April 17th, 2011

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Common Garter Snake in Goldwitz Bog

The Turtle Journal team visited nearby bog wetlands this morning in hopes of finding their first snake of the season.  Last night howled with storms that pelted the South Coast with torrential downpours, yet temperatures remained mild in the mid-50s.  The early morning high tide, augmented by a fierce southwesterly gale, flooded banks of Sippican Harbor in Buzzards Bay.  As the sun rose, though, the day moderated and glistened in bright sunshine.  Perhaps today would mark our first springtime encounter with the slithering reptiles.

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Painted Turtles Basking in Bog Reservoir

We waltzed along bog channels to check for basking spotted turtles.  Alas, none were to be found.  At the reservoir, though, painted turtles staked out basking rocks as they increased their internal body temperatures to begin foraging and then mating. 

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Common Garter Snake Basking at Goldwitz Bog

Even though Don had been expecting to find the first snake of the season basking along the bog path today, he managed to step right over this good sized garter snake that had completely blended into the pathway as if it were a protruding tree root.  Luckily, Sue spotted the snake that Don had nearly tripped over.

Common Garter Snake (Thamnophis sirtalis)

Common garter snakes are widely distributed throughout North America.  Since garter snakes are the Massachusetts’ state reptile, it seemed fitting to be the first snake that we encountered this spring season.

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Northern Water Snake (Nerodia sipedon)

Garter snakes are not the only snakes found in the wetlands of the abandoned Goldwitz cranberry bog.  One of the first slithering reptiles we discovered in this locale was the northern water snake, a large, “non-venomous” snake native to North America.  They are darkly colored and interestingly patterned and are sometimes mistaken for copperheads.  These snakes aggressively defend themselves by repeatedly striking and biting when cornered, and their saliva contains a mild anti-coagulant.  Since Don is on a strong anti-coagulant, he has no desire to test the limits of this “non-venomous” additive.

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Juvenile Northern Water Snake (Nerodia sipedon)

The Turtle Journal team ran into a juvenile northern water snake at the bog a while back that proved everything that books say about their aggressive behavior.  We have never seen a more combative critter in our field studies.

Aggressive Juvenile Northern Water Snake

Don gently prodded the vicinity of this juvenile snake to assess it reaction.  And, boy, did it react!  After the first few strikes at the pole end of our ten foot long net, we were really glad that the pole was ten feet long.  Despite that energetic encounter, snakes remain one of our favorite Turtle Journal creatures.  They are extremely beneficial to the environment and the eco-system, and they’re just plain gorgeous … once you get beyond the slithering cold-blooded reptile thing (smile).

Creatures of the Night (in Springtime Bog)

Friday, April 15th, 2011

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American Toad (Bufo americanus)

Pitch black, heavy clouds and driving rain.  The absolute best springtime conditions to venture into swamps and bogs of Massachusetts’ South Coast to spy on the ardent rituals of awakening amphibians.  The Turtle Journal vehicle splashed through bottomless puddles.  Our lights probed the gooey darkness as we crawled along a cratered one lane road half a mile through flooded wetlands to reach the abandoned Goldwitz cranberry bog.  Our arrival was greeted by a riotous cacophony of spring peepers, American toads and wood frogs.

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American Toad from Nighttime Goldwitz Bog

We donned our field gloves, grabbed our sampling nets, snapped on our flashlights and plodded through several inches of rain as we searched the bog channels for creatures of the night.  Spring peepers were everywhere, and we decided to net one of them last because they are so difficult to restrain in the darkness.  Sue Wieber Nourse spotted an American toad and snagged it for closer examination.

Examining American Toad

The Eastern American Toad is a medium size amphibian and fairly common in the wetlands of Southeastern Massachusetts.  This specimen proved quite cooperative during documentation and was quickly released back into the bog channel to continue its mating rituals.

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Spring Peeper (Pseudoacris crucifer)

Don Lewis netted two spring peepers for closer examination.  They are brown, tan or beige, and can easily be distinguished by the dark “X” or cross on their back; hence, the name “crucifer” or cross-bearer.

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Spring Peeper from Nighttime Goldwitz Bog

These tiny frogs, ranging from less than an inch to maybe an inch and a half, are the most common voices in South Coast wetlands during the spring. 

Examining Spring Peeper

So small, they are quite difficult to control and photograph at night without harming the animal.  We snapped a couple of quick photographs and captured a short video clip as they escaped from the back of the Turtle Journal vehicle.  Within a wink, the peepers had disappeared into the night storm.  Drenched, but contented, we also disappeared into the darkness as we retraced our way back to Turtle Journal central.

Female Spotted Turtle Basks in Goldwitz Bog

Monday, April 11th, 2011

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Rufus, Sue Wieber Nourse and Female Spotted Turtle

Rufus Retriever, the new Turtle Journal research dog, and Sue Wieber Nourse discovered a mature female spotted turtle basking on the channel bank of the abandoned Goldwitz cranberry bog in Marion, Massachusetts on Sunday.  Turtle Journal has been checking this bog since mid-March and this turtle marked the first spotted we have seen at this location in 2011.

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Female Spotted Turtle (Clemmys guttata)

Spotted turtles are a small, elusive wetlands species.  This mature female weighed only 189 grams and showed annual growth lines that indicated she was approximately 11 years old.

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Female Spotted Turtles Have Bright Colorful Necks

Spotted turtles exhibit sexual dichromatism.  Beyond morphological differences, females can be identified by a brightly colored yellow/orange neck.  Males in contrast have a drably colored brown or gray neck.

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Female Spotted Turtle Tail

Female spotted turtles also have a thinner tail than males, and the anal opening generally falls inside the carapace (top shell).

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Female Spotted Turtle Carapace

As usual, we took three straight line measurements of the carapace.  The length of the carapace measured 10.4 centimeters and its maximum width was 8.2 centimeters.  The width at the suture between the first and second costal scutes measured 7.9 centimeters.

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Female Spotted Turtle Plastron

The plastron (bottom shell) measured 9.7 centimeters from front to back along the central suture line.  The width of the plaston behind the bridge was 6.05 centimeters.  Female spotted turtles have a largely flat plastron while males have a concavity in the center of the plastron posterior to the bridge.

Spotted Turtle Somersault

Spotted turtles offer a special show when they return to the bog channel after basking on its banks.  A good number of them slip and slide down the steep bank and hit the bottom at such an unusual angle that they do an unintentional somersault into the water.  The one captured in the video above obligingly showed her stuff for the Turtle Journal cameras.

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Wild Turkeys Lead Turtle Journal Out of Bog

As Sue and Rufus drove out of the bog along its one-lane wooded road, they were led by a couple of wild turkeys who moved with a slow sureness that showed they considered this roadway their own.