Honestly I was thinking of how “flying birds” could be added, and with
@CharlieXGaming mentioned on what is needed to add some more flair than say another deer (I want another deer though). So I think the animal should be the scarlet ibis.
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I mean it can not only be another bird, but also South American representation. But here is what I think the gameplay feature could be: it can “use” the climbing pieces, and maybe even “fly” up to them. It wouldn’t be true free flying, but essentially a long jump up to one of the climbing pieces. Maybe on a climbing piece like a rope it can slide left or right, but it can’t “climb up” like a monkey or lemur can. So if you have a large habitat and set up some ropes, the scarlet ibis flock can “fly” up to it. So you could make a pretty convincing aviary!
It would look something like this:
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I made this in 3 seconds on Procreate but this is what I was thinking. I can imagine a number of birds could be added with the “jump” mechanic being paired with claimable objects. It will allow people to build birds into habitats with verticality. It wouldn’t be as glitchy as regular climbing either as the birds would only “fly” (jump) to where they need to go.