Conniving Corvids, from Pitt Manor III
The Corvids are a fascinating family of birds.
1) "It’s a good example of a behavior with widespread anecdotal evidence and the appearance of intelligence and complexity. Overall, there are few animals capable of distracting another individual to steal its food—for most species, food-stealing is always just opportunistic."
Crows: The tail-pulling, food-stealing bird prodigies
2) Kaeli Swift runs a good blog site on corvids.
3) Swift's research on raven "funerals" and remembering threats is very interesting: The birds that fear death.