The collective noun for walruses is a herd. Pod, team, and rookery are the other collective nouns for walruses.

The collective noun for peasants is a horde. Mob, throng, and rabble are the other collective nouns for peasants.

The collective noun for skylarks is a descent. Bevy, exaltation, and hover are the other collective nouns for skylarks.

The collective noun for pilchards is a shoal. School, run, and catch are the other collective nouns for pilchards.

The collective noun for penguins is a colony. Waddle, raft, and huddle are the other collective nouns for penguins.

The collective noun for stoats is pack. Skulk, confusion, and business are the other collective nouns for stoats.