Cope's Gray Tree Frog

It is my go to guide, as far as I know it is the only site with maps like this. All others just show them both with the same range. I have both in my area so it doesn't help me much, but much of central-eastern US is only Cope's Gray, which is great to know!

Thanks for sharing those range map links. Very helpful information. :-)

It does. It was exactly what I wanted to know, since the map I found showed them overlapping. Very cool

Of course. Technically, yes you can tell them apart by the trill rate, but only when they are at the same temperature. Only problem is you have no way of knowing if they are at the same temperature or not. So I only rely on genetics, which obviously is not practical in the field. There have been groups of people who have gone and collected tons of treefrogs from all over the range and done genetics work on them. AmphibiaWeb has the range maps. In areas they have not done genetic work at, they still show both species being there. But Minneapolis is just on the outside of the Gray range, but Cope's Gray continues through Minneapolis. Here are the maps:
Cope's Gray, http://berkeleymapper.berkeley.edu/index...

Gray, http://berkeleymapper.berkeley.edu/index...

Hope that makes sense!

Sorry, copying tired late at night. From what I read the only ID key between the two is voice or Dna. May I ask how you know it is a Copes?

Karen, this is a Cope's Gray Tree Frog. AmphibiaWeb has range maps for both species based on genetic work that has been done and determined Gray from Cope's Gray. Minneapolis has Cope's Gray, not Gray. Also, when suggesting IDs, please use the correct spelling on scientific names.

Nice colors on this cope's!

http://en.wikipedia.org/wiki/List_of_amp...