Here is some additional feedback that I gave to one of the other designers (it may also be relevant to you):
1. Dogs/foxes are not generally the type of animal that users of the site will be focused on. Birds, reptiles, insects and fish will be the main groups of animals of interest. Mammals will be of interest but less so, I think.
2. The logos that are doing best in my rankings at the moment, are those that reference multiple species or those that are species that are globally relevant (eg birds).
Cheers
Geoff Shuetrim