Not a first line -- just some animal groupings:

A cloud of bats.
A crush of rhinoceruses.
A squabble of seagulls.
A parade of penguins.
An ostentation of peacocks.
An exaltation of larks.*

*This is the title of the dictionary of these terms, by James Lipton.

Here's the first line:

"Most introductory chapters are written in the well-grounded expectation that they will be blithely ignored."