Common
Swift:
UK Status: Summer resident,
overwintering in Africa, migrating back and forth each year
(approximately) a total of 6800 miles. Swifts return to the UK from late
April to early June, depending on latitude, and seasonal conditions.
They leave for Africa again in late summer, or early autumn.
Habitat: The Common Swift
exists on every continent in the world, with the exception of the far
north and south, and some Islands. They inhabit anywhere their is a
sufficient supply of insects, and suitable nesting sites. They are very
long lived, and can reach 20 years of age, spending at least 90% of this
time on the wing, in flight.
Breeding: This bird makes
it's nest on vertical surfaces, such as high walls, and rock faces. Some
choose to use a cavity space in rock faces, or human buildings. These
birds have extremely short weak legs, and use these high places to get
airborne again. Nests are almost basically upside down domes, with a
small entrance they are made from the birds own saliva. Their eggs are
quite elongated, and two, or three matte white eggs are laid in a
clutch.
Comment: This bird is
fairly well distributed throughout the UK, where ever their are older
buildings, or suitable rock faces. It is becoming scarcer, but that is
still reversible, see below.
NOTE:
There is much concern over this birds continued existence in the British
Isles, numbers have drastically declined over the last few decades. Most
of their problem in the UK is loss of suitable habitat due to modern
building techniques. Conservationists are lobbying the government to
make special 'Swift Bricks', to be compulsory used by law in modern
buildings as they are erected. Many of these conservation groups are
offering Swift nesting boxes to be attached to your buildings, or
consider installing Swift Bricks. We have a thriving colony here in
Pudsey, that was established decades ago. I hope to get some better
pictures as the summer progresses.