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( 4 comments — Leave a comment )
kengr
May. 3rd, 2019 05:31 am (UTC)
Wed, 14:07: tilthat: TIL that due to the lack of natural predators on the Gal�pagos Islands, the wildlife is very... https://t.co/QnLHRe6sUY

What would the predators evolve *from*? Going from herbivore to omnivore, much less carnivore is a *really* big jump.
fayanora
May. 4th, 2019 04:04 am (UTC)
Not really. There are plenty of herbivores that occasionally munch down on meat. Squirrels and deer come to mind. It wouldn't be much of a leap for an herbivore to evolve into a meat eater.
kengr
May. 4th, 2019 08:11 am (UTC)
Are any of them on the Galapagos? No.

There are *no* native mammals on those islands. Just reptiles and birds.

Also "eating meat" is not the same as being a predator. Being a predator (rather than a scavenger) requires being able to hunt and kill prey. That's a rather more extensive set of changes, most of which don't offer an advantage until you have the whole set.
fayanora
May. 5th, 2019 05:03 am (UTC)
I wasn't talking about scavengers either. Like, deer for instance have been known to seek out bird nests and chow down on the helpless baby birds. That's predatory behavior.
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