colony vs animal group

colony and animal group both are nouns.

Word	Noun	Adjective	Verb	Adverb
colony	Yes	No	No	No
animal group	Yes	No	No	No

As nouns, animal group is a hypernym of colony; that is, animal group is a word with a broader meaning than colony:

colony (noun)	animal group (noun)
a body of people who settle far from home but maintain ties with their homeland; inhabitants remain nationals of their home state but are not literally under the home state's system of government	a group of animals
a group of organisms of the same type living or growing together
(microbiology) a group of organisms grown from a single parent cell
a geographical area politically controlled by a distant country
a place where a group of people with the same interest or occupation are concentrated