Here is my take on things, especially after working with several out of this group.
1.) Elephants
2.) Certain dolphin species (notably Orca, Pseudorca, Bottlenose, and Roughtooth Dolphins)
3.) The great apes
4.) Corvids (mainly ravens and certain crows)
5.) Gibbons and larger new and old world monkey's
6.) Cockatoos and Kea
7.) Pigs
8.) Sea Lions and other certain dolphin species (Commerson's, pilot whales,belugas, etc...)
9.) Other larger parrots (macaws, amazons, eclectus, greys, etc...)
10.)Bears
1.) Elephants
2.) Certain dolphin species (notably Orca, Pseudorca, Bottlenose, and Roughtooth Dolphins)
3.) The great apes
4.) Corvids (mainly ravens and certain crows)
5.) Gibbons and larger new and old world monkey's
6.) Cockatoos and Kea
7.) Pigs
8.) Sea Lions and other certain dolphin species (Commerson's, pilot whales,belugas, etc...)
9.) Other larger parrots (macaws, amazons, eclectus, greys, etc...)
10.)Bears