EEB386H1 Study Guide - Final Guide: Snow Goose, Food Security, Photoperiodism
23 Apr 2015
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Document Summary
North american bird cycle: breeding (sometimes cancelled when run out of time, moulting, wintering, migration. Ultimate control of annual cycle food abundance: evolutionary factor that tells the bird when to breed. Proximate factor of annual cycle photoperiod (endogenous cycle: the factors that give cues for the bird to begin breeding. White crowned sparrow life cycle: temperate breeding migratory songbird, annual cycle for migratory birds. Two moultings: two incomplete moults, pre-breeding moult partial moult. Breeding season: territory establishment, defense, female attraction, courtship, pairing, nest building, egg laying, raising, fledging young. Wintering period: annual cycle for nonmigratory birds. Post-breeding molt: the complete moult post-breeding (non-breeding) renews the plumage, moult with no seasonal change. Breeding: they have 100 non-frost days to complete breeding and moulting, males arrive late may to establish their territory with song and aggressive chase. At the same time, establishes feeding territory. Pre-req for pair formation: pair formation. Females then start to build nest (takes 5 days: nest.
