Pennsylvania Angler & Boater - November/December 2020 - 50
Cope's Gray Treefrog
Cope's Gray Treefrog
by Deborah Weisberg
An obscure amphibian-the Cope's Gray Treefrog-has
resurfaced in Pennsylvania, adding to the state's herpetological
diversity at a time when some species are disappearing.
Although believed to be native, the Cope's Gray Treefrog
was recently heard for the first time in decades in the
southwestern region of Pennsylvania, prompting herpetologists
to want to learn more about its abundance and distribution.
The thumb-sized frog, more typically found in southern
states, was discovered in Pennsylvania almost by accident,
since it was initially misidentified as its close cousin-the
Gray Treefrog.
"The two species look identical. If you are holding
both of these species, you cannot tell them apart," said
50
photo-Brandon Ruhe
herpetologist Chris Urban, the Pennsylvania Fish and Boat
Commission's natural diversity chief. "But, these frogs
sound completely different in its mating calls. That is the
only way you can tell, aside from DNA testing."
An individual submitted an audio recording of what
he believed to be a Gray Treefrog to the Pennsylvania
Amphibian & Reptile Survey (PARS), a 10-year
project aimed at mapping hundreds of snakes, turtles,
salamanders, and other "herps" across the state.
When a committee of 12 scientists, including Urban,
heard the recording they realized that they were not
dealing with the Gray Treefrog but with the Cope's Gray
Treefrog. "It was an exciting moment," said Urban.
"We were very pleased but not taken aback since some
of us suspected we may have the Cope's Gray Treefrog in the
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Pennsylvania Angler & Boater - November/December 2020
Table of Contents for the Digital Edition of Pennsylvania Angler & Boater - November/December 2020
Pennsylvania Angler & Boater - November/December 2020 - Cover1
Pennsylvania Angler & Boater - November/December 2020 - Cover2
Pennsylvania Angler & Boater - November/December 2020 - 3
Pennsylvania Angler & Boater - November/December 2020 - 4
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Pennsylvania Angler & Boater - November/December 2020 - Cover3
Pennsylvania Angler & Boater - November/December 2020 - Cover4
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