Collectives of the animal variety:
http://www.worldwidewords.org/articles/collectives.htm
“People often write in about the conventional terms for groups of animals and people, especially birds, such as parliament of rooks or murder of crows. Many of these, including tiding of magpies, murmuration of starlings, unkindness of ravens, and exaltation of larks, are poetic inventions that one can trace back to the fifteenth century.”