All of these cards are very strong, with Cable Car and Aquarium being the strongest, but Baboon Rock, Meerkat Den, Penguin Pool and all the other sponsors that give you a tile and reward you for specializing in animals or icons are also extremely strong.
Think about it this way: an elephant is worth 13-22 points depending on the endgame card you draw, but baboon rock with 6 primate icons is worth 15 points and was free to play, not 36 money. Granted to hit the 6 primate icons you want to snap a lot of cards, use your card draw placement bonuses, unlock the snap cube on your player card, or otherwise find ways to grab monkeys when they appear on the display. Reptiles with snap can help with this.
Baboon rock also makes the other primate sponsors worth 2 points. Playing baboon rock then follow it with a solid play of new world monkeys can be pretty great for early appeal points.
If you break down your card tableau according to the point value at the end of a game, sponsors can be surprisingly hefty in terms of point value. A caracal only gives me 4 points but native lizards usually gives me 7 or more, and again, free to play.
