What species aren't kept in captivity?

[ilgecko]

I know that there are hundreds of species kept worldwide in zoological parks, but there are species that aren't kept in places all around the world. What are some species that are listed on, well, the no captivity list?

 

[Chlidonias]

There are literally millions of species not kept in captivity.

 

[Westcoastperson]

Also I’m almost sure there’s already a thread for this.

 

[Bengal Tiger]

This thread may be of use: Are These in Captivity?