That would probably be either the ant or the termite.
The most common animal/s are insects.The most common insect is a fly
The most common problem following an animal bite is simple infection
I wouldn't say most 'popular' I'd say most common. If there were to be a most common animal, it would be cats.
the most common animal in the southern ocean is the Cape Petrel
The most popular animal is the lion or llamah. ♥
Insects, especially ants and termites, are the most common animal in nearly all deserts.
The most common element in wool is animal fleece.
pigs and rabbits
kangaroo
Dog
Penguin's...
elephant