No registry that I am aware of, but some government sites do post all of the webcams within their agency/department/etc., like NPS Air Quality Web Cameras.
I keep a lists of some webcams, here are the ones that have animals.
EarthCam Live Webcam Network has over 500 Search Results for "Animals and Zoos" as well as an Animal Cams section.
Eagle Cam @ ...
USDA's National Institute of Food and Agriculture (NIFA) has data like this; start at the:
NIFA Data Gateway
Enter "livestock diseases indiana" in the Search Projects form control input results in:
68 Projects with terms "livestock diseases indiana"
Second result looks like a hit:
Prevalance & Molecular Relationship Between Fecal Culture, Elisa & ...
this sounds like a pretty specific dataset that may or may not be available (I know, that's the whole point of posting on here) and while I dont know where to find this exact dataset, here are some datasets that might help you get to your end goal and/or create proxy/synthetic data for you to practice analysis on.
The Indiana Geographic Information Council (...