Actually, the most adaptable on the planet are, in no particular order:
1. Mosquito
2. Bee
3. Ant
4. Termite
5. Peregrine Falcon and Barn Owl (which has an unfortunate 2-year lifespan)
6. Starling (foul little bird!)
6. Pigeon (foul little bird!)
6. Gull (foul little bird!)
7. Rat/mouse
Yes, I know there are 3 sixes. Starlings, Gulls, and Pigeons are, in my opinion, Hellspawn.