My collection

I collect these. If you can't figure out what 'these' are, the answers are located to the right of each animal. Two stand out. Which?

Banded mongoose Genet Snow leopard White-faced saki Red fox Spotted hyena A cichlid fish Striped Hyena True lemming Western gorilla Meerkat American bison Loggerhead sea turtle Mediterranean monk seal Chicken Capybara Sally Lightfoot crabs Indri

Mungos mungo Genetta genetta Uncia uncia Pithecia pithecia Vulpes vulpes Crocuta crocuta Pundamilia pundamilia Hyaena hyaena Lemmus lemmus Gorilla gorilla Suricata suricatta Bison bison Caretta caretta Monachus monachus Gallus gallus Hydrochoerus hydrochoerus Grapsus grapsus Indri indri