Breeding success of Canada and Greylag Geese Branta canadensis and Anser anser on gravel pits

摘要: Since the introduction of Greylag and immigration Canada Geese to study site in 1972, number nests both species has increased, though a little erratically case Greylags. Each year Canadas nested earlier than About 90% were on islands. Island had significantly lower rates predation (by Foxes Crows) mainland but when an island became accessible most destroyed. Overall nesting success was high for gosling mortality higher The may account mortality.