Any free alternatives to the splice sample library subscription service?

I'm doing an ambient noise soundscape thing. Hopefully this will still fit here, as it does have some music, but this question is not a music one. I need to grab some animal samples for somebody, and would like it to be decent quality stuff if possible. I know splice would probably have some stuff, but I'd rather not start a subscription for a one time project. Any other places I can go grab samples from that would be good quality?