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identification tree frogs of Costa rica

PostPosted: Thu Jun 28, 2018 11:09 pm
by lakiere pieter
Does anyone know the name from these species of treefrogs? I found them in Costa Rica years ago. I can not find them in my fieldguide "amphibians and reptiles of Costa Rica". 191 species of amphibians are listed in the guide.

Re: identification tree frogs of Costa rica

PostPosted: Fri Jun 29, 2018 10:20 am
by Michal Szkudlarek
Have you tried comparing with photos of species at amphibiaweb?

Re: identification tree frogs of Costa rica

PostPosted: Fri Jun 29, 2018 11:54 am
by Ruggero Morimando
I've no idea about the species: I've a big beautiful book about Costa Rica, but no time at the moment.
But I have an hint: I think the latter one could be an albino specimen of an otherwise more usual species... don't you think about this possibility?

Re: identification tree frogs of Costa rica

PostPosted: Fri Jun 29, 2018 7:08 pm
by lakiere pieter
Ruggero Morimando wrote:I've no idea about the species: I've a big beautiful book about Costa Rica, but no time at the moment.
But I have an hint: I think the latter one could be an albino specimen of an otherwise more usual species... don't you think about this possibility?

I tried amphibiaweb also. The only thing I can conclude is that it's indeed an albino or hypomelanistic specimen maybe. My book describes all 191 species exist in Costa Rica. None of those resembles to the one I found. Not even close to.

Re: identification tree frogs of Costa rica

PostPosted: Fri Jun 29, 2018 11:00 pm
by David Broek
The first picture is Pristimantis ridens.
The other pictures are Hypsiboas rufitelus. The reason the frog is relatively white is not albinism but simply because they have this coloration only during daytime. At night they get more greenish and more stunning in general. This shows perfectly the problem with the book you are referring to (and many other fieldguides), species are too variable to capture in one image. For identifying amphibians in my opinion 'Amphibians of Costa Rica' by Twan Leenders is way more usefull with better images and diagnostic characteristics described.

Re: identification tree frogs of Costa rica

PostPosted: Sat Jun 30, 2018 7:47 am
by lakiere pieter
David Broek wrote:The first picture is Pristimantis ridens.
The other pictures are Hypsiboas rufitelus. The reason the frog is relatively white is not albinism but simply because they have this coloration only during daytime. At night they get more greenish and more stunning in general. This shows perfectly the problem with the book you are referring to (and many other fieldguides), species are too variable to capture in one image. For identifying amphibians in my opinion 'Amphibians of Costa Rica' by Twan Leenders is way more usefull with better images and diagnostic characteristics described.

Thank you for the reply. Mystery solved.

Re: identification tree frogs of Costa rica

PostPosted: Sun Jul 01, 2018 11:57 am
by Robin Duborget
You also have the digital guide of Brian Kubicki for the frogs.

Robin