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I often think how big an area the birds actually fly round in, except for the ones that migrate
This is an interesting question because each species has its own strategy.Robins and dunnocks have tight territories encompassing approximately oneand a half average gardens although boundaries may go into up to fourgardens. They do not seem to use topographical features such as fences todefine boundaries, hence why up to 4 or six robins are a possibility incertain gardens. Blackbirds have slightly larger territories but they willforage outside these territories anyway in response to food availability.Other birds have breeding ranges that do not have strict territorialboundaries although there is a discreet spacing of nests. Most of thesebirds form winter feeding flocks that have set circuits providing foodremains constant in the circuit. Tits and finches follow this pattern, as dostarlings and sparrows although the former sometimes move away to big winterroosts.