Too cool refs.

[John Bois <jbois@umd5.umd.edu>]

Heinrich B. 1999 The Mind of the Raven. Cliff Street Books, NY, NY.

Chapter headings include:
Partnerships and Social Webs
Individual recognition
Prestige among ravens
>From wolf birds to human birds
Morality, tolerance, and cooperation
Deliberate acts

Apologies if someone already noted this.

Also, Newton, I.1998 Population limitations in birds. Academic Press, NY,
NY.

A wonderfully exhaustive review of this topic. Great chapter on predation.
The following truths about nesting avians seem to me to be also relevant
to non-avians:"Losses tend to be heavy among species that nest on the
ground (in which the sitting hen is sometimes taken too), somewhat less
heavy among species that build open nests among shrubs and trees, and
lighter still among species that build open nests in shrubs and trees, and
lighter still among species that use more protected sites, such as tree
cavities or cliff ledges."