Peregrine falcons have been nesting on the roof of Merton Civic Centre in Morden each year since 2015.
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What to look out for
The female normally lays three or four eggs in late March or April, which hatch about a month later. The chicks fledge at 38-44 days old. The adults then spend two months or more teaching the young to hunt before they become independent.
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Find out more about peregrine falcons
London Peregrine Partnership website.