Sunday, July 31, 2016

Treefrog in the Garden

This tree-frog in Erika’s rose bush is may be a Gray Treefrog. The problem is that Gary Treefrogs can not be told from Cope’s Treefrogs, except by call.  But even the call is similar. The Gray’s call is slower than the Cope’s. This one was silent. Grays also have twice the chromosomes as Cope’s—no help here. Both species venture into urban areas.

Gray Treefrogs spend the winter partially frozen under leaf litter.  This frog’s liver coverts glycogen into glycerol, which prevents ice formation in their tissues. Some of their organs can also tolerate ice crystals. Some tropical treefrogs are among the most poisonous of animals. Skin secretions from Gray Treefrogs can be very painful if you get the secretions in your eyes, nose, or open sores (Savannah River Ecology Lab).

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