The incredibly agile birds migrate to the UK each year with the first usually arriving in late April or early May. Once here they stay long enough to breed before returning to Africa at the end of summer.
The UK’s population relies on buildings - where they make their nests under the eaves of older properties - for their nest sites: but such spots are easily lost when roofs are repaired.
Otley Swift Watch was started in 2017 by volunteers who wanted to find out where swifts were nesting so they could talk to property owners about how to preserve the sites. To find out more, download the leaflet below.