Predators can affect individual fitness and population and community processes through
lethal effects (direct consumption or 'density'effects), where prey is consumed, or through …

Behavioral ecologists generally agree that animals derive benefits from familiarity with
spaces that they inhabit or visit, yet site familiarity is rudimentary or lacking in most models of …

An organism's ability to disperse influences many fundamental processes, from speciation
and geographical range expansion to community assembly. However, the patterns and …

Summary 1 Territory quality may affect individual fitness and contribute to density‐
dependent reproduction, with repercussions on population regulation. We investigated the …

Intraguild predation, the killing of species that use similar resources, has been largely
overlooked in raptor investigations. To help fill this gap in knowledge, we conducted a …

This paper is concerned mainly with the differences between obligate and facultative
migration in birds. Obligate migration is considered “hard-wired”, in that the bird seems pre …

One of the most striking features of bird migration is its regularity. Most populations of birds
migrate at about the same dates, in the same directions, and for similar distances each year …

Summary 1 The role of individual experience vs. the use of conspecific cues on breeding
dispersal decisions have seldom been determined in colonial birds. We studied causes of …

We studied the dispersal behavior of 1,475 northern spotted owls (Strix occidentalis caurina)
during banding and radio-telemetry studies in Oregon and Washington in 1985-1996. The …

Natal dispersal is of central interest when determining demography and genetic structure of
populations and managing endangered species with fragmented distributions. However …