A group of seagulls is called a colony. This is the traditional collective name, although of course the formerly "incorrect" term, a flock, has entered the language as well because of its popularity.
Collective nouns for seagulls are:a colony of seagullsa flock of seagullsflotilla of seagullsa pack of seagullsa scavenging of seagullsa screech of seagullsa squabble of seagullsa swoop of seagulls
A group of ants is called a colony or an army.
a group of penguins is called a colony.
A group of beavers is called a Colony.
A group of beavers is called a colony .
I believe the correct terminology to describe such a group would a, "flock".
A Colony
A group of bats is called a colony.
A group of ants is called a colony or an army.
A group of ants are called a colony/army of ants
A group of bats is called a colony.