Re. Birds hunting in cooperation

[Tommy Tyrberg <tommy.tyrberg@norrkoping.mail.telia.com>]

To take a few examples from other avian families which I have personally 
witnessed:

Hobbies *Falco subbuteo* cooperate when hunting swifts *Apus apus*

Mergansers *Mergus merganser* form large flocks which collectively drive 
schools of fish

Corvids e. g. magpies *Pica pica* cooperate very efficiently when harrying 
predators, e. g. cats. This isn't exactly hunting behavior but is closely 
related. One bird keeps the cat occupied in front while the other sneaks in 
from the rear and pecks the cat.

Tommy Tyrberg