Go to the main
birds page for more information about birds, nests etc..
Birds lay their eggs and raise their
young to coincide with the time when their particular food source is
most abundant. Thrushes, for instance, are able to eat all sorts
of insects, slugs and seeds found on the ground and hence are not too
limited by peaks and troughs of food. They just need to ensure
that there is enough to feed them and their young, and that the trees
and bushes in which they nest can provide enough cover.
Insect eaters need to wait a little
longer until their prey hatches or emerges. For instance, winter
moth caterpillars abound in May and some species wait for this event.
Seed eaters need to wait for plants to flower and set seed and hence are
later still. Some birds of prey feed on young birds their
populations are highest from mid summer onwards.
The table below shows how these
varying strategies influence the nesting period of birds.
||Eggs in the nest
||Nestlings in the nest
||Fledglings being looked after by