It really depends on the type of bird. Some lay all year round, some just for a few months of the year. However, chicks are noticed more in Spring because it's the best weather (and best time for food). If you have a specific bird in mind, you may want to look up its breeding behaviour in an encylcopedia or Google it.
Spring
Yes they can!
no
Swans lay eggs, so they do not get pregnant.
in Canada
They lay, on the average, three to eight eggs. Only one clutch of eggs is laid per year. A swan builds their nests out of stems and leaves from plants such as cattails and sedges. Trumpeters often nest on top of muskrat or beaver lodges.
Swans are not mammals, therefore, they lay eggs and sit on them until they hatch.
i don't think they lay eggs
Lay eggs, (of course! they're birds) Swans have their babies by laying eggs. Birds do not give live birth like mammals do.
lady birds lay their eggs all through the year particularly in spring but they don't lay their eggs near the end of summer due to normally eating and dieing about this time.
they lay about 80 eggs up to 6 times a year
None of your business they usually lay eggs i Spring what do you think?