Common Swift

• locomociónIt can stay airborne for months on end, even sleeping and mating on the wing.
• It can spend up to ten months at a stretch on the wing: it feeds, sleeps and mates in flight, and only comes down to breed. At night it climbs to around 2,000 m and sleeps on the wing, slowing its wingbeat from ten to seven beats per second.

Skeleton type

Vertebrate - internal bony skeleton (bird)

Habitat and environment

It breeds in cavities in buildings, under eaves, and on rock faces and sea cliffs; the rest of the time it lives on the wing

Size at birth

Eggs of 3.2 to 4.2 g; the chicks stay between 35 and 59 days in the nest and leave it flying, never to return

Sexual maturity

2 years

Gestation / incubation

19-21 days of incubation

Litter / clutch size

2-3 eggs, with a single clutch a year

Sources consulted: https://es.wikipedia.org/wiki/Apus_apus

Best time: From May to August, when it breeds and chases insects in flight over towns and cities