My Free Zoo - Watch the birds fly around in the new bird houses!
All you need to do is place pathways at your bird houses' entrances, and your visitors will use them.
Get your first new bird house now, and present your visitors with the extraordinary birds such as the Glittering-throated emerald (from level 40) as well as the Black-chested Buzzard-Eagle (from level 52), and breed them. Of course the bird houses again come in three different sizes.
Did you miss out on getting yourselves the killer whale as exclusive bonus animal? Then you'll be able to get yourselves one now: from level 50 onwards, you'll be able to buy the orca in your zoo shops!