When considering cases in which territorial aggression occurs between species, we find that
the relationship varies with the species' geographical and ecological distributions. If similarly …

Territories of birds, usually defended against conspecific individuals, are sometimes
defended against individuals of other species. Since such behavior is demanding both of …

Seasonal patterns in territorial behaviour are common in many species, and are often
attributed to the adaptive benefits of increased defence or the provision of information to …

Two types of competitive interactions occur among species in bird communities: exploitation
and interference. Most theoretical and empirical approaches to the ecology of competition …

Group territorial behavior and cooperative breeding are now recognized as widespread
phenomena among birds of warm-temperate, subtropical, and tropical climates. Ecological …

Recognition of the diversity of systems of territoriality among species has clearly indicated
that an understanding of the evolution of territoriality requires a theory which accounts for the …

In examining the factual evidence on which the concept of population regulation through
territorial behavior is based it was found desirable to differentiate between three critical …

In order to understand fully the evolution of a behavioural trait one must not only consider
whether it is adaptive in its present environment but also whether it originated as an …

1 This paper forms an introduction to a symposium on the territorial behaviour of birds. 2
Following Noble (1939), territory is defined as “any defended area”. A simple classification of …

In a recent series of papers, Thomas E. Martin has suggested that selective, density-
dependent predation on nests may promote ecological diversification of birds and constrain …