Showing papers by "H. Lisle Gibbs published in 1986"

Spitefulness, altruism, and the cost of aggression: evidence against superterritoriality in tree swallows

Abstract: used in mobbing probably arose as a flight intention movement (Daanje 1950, Hinde 1954). A component of the evidence for its origin as a flight intention movement is the change in posture that accompanies the wing and tail movements; the movement is similar to the postural change that often precedes flight. This component of the flit (the change in posture) is missing from trogon mobbing tail flits. This suggests that in mobbing the important factor is movement, which enhances visibility to other birds and perhaps confusion of the predator (but see Curio 1978). Trogon mobbing may illustrate the value of mobbing among small birds or other passively mobbing species. Although these species are not likely to drive large pred-