Bird dispersal

Bird dispersal is the movement of individual birds away from their birthplace or breeding site. It differs from regular seasonal migration, which is repeated movement between seasonal ranges.

Natal dispersal: Movement by an animal from its birthplace to the place where it first breeds. This is the departure from a bird’s birthplace captured by the concept.
Animal migration: Regular, often seasonal movement of animals between regions or habitats. It provides a useful comparison with one-way movement between life stages or breeding sites.
Biological corridor: A habitat connection that facilitates movement between otherwise separated habitat patches. Corridors can help dispersing birds cross fragmented landscapes.
Great tit: A Eurasian passerine bird, Parus major, common in woodland and gardens. Long-term studies of great tits document individual variation in natal dispersal.
Breeding dispersal: Movement between breeding sites after an animal has reproduced at least once. It describes birds changing breeding locations after their first reproductive attempt.
Population dynamics: Changes in the size and structure of populations over time. Dispersal redistributes individuals and affects population growth and persistence.
Habitat fragmentation: The division of continuous habitat into smaller, more isolated patches. Fragmentation can obstruct movement and reduce successful settlement.
Isle Royale wolves: A wolf population on an isolated Lake Superior island, studied through long-term ecological research. The case illustrates how isolation and rare immigration shape a population, though it concerns mammals rather than birds.
Dispersal kernel: A probability distribution describing the distances or destinations reached by dispersing organisms. It summarizes how far birds travel and how dispersal distances vary.
Gene flow: Transfer of genetic variants between populations through reproduction by migrants. Birds that disperse and breed can carry genes between populations.

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