In the German language weblog Tierstimmen are various sound files of animal species, past and present; sometimes with videos.
They include voices of amphibians, snakes, and crocodiles.
And a video of a rattlesnake, of the species Crotalus atrox, the western diamondback rattlesnake.
Eastern diamondback populations are declining to dangerously low levels, largely because of festivals like the annual hunt in Opp: here.
Albino American alligator: here.
Stream salamanders and atrazine herbicide in the USA: here.
Palaeontology of amphibians and reptiles: here.
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