A new longevity
record for Sociable Weaver’s – Philetairus
socius – of over 16 years. The bird was ringed by Mark Anderson on 29 April
1995 as an adult on Benfontein Game Reserve, Kimberley, Northern Cape,
South Africa.
It has been recaptured several times, the most recent time being by Rita Covas
on 2 August 2010.
Sociable Weaver
The Sociable
Weaver - Philetairus socius - is endemic to Southern
Africa. The species ranges across northwestern South Africa, southwest Botswana and extending northwards across Namibia. The
area is semi-arid with low and unpredictable rainfall occurring mostly in the
summer.
Description
A buff brown bird
with a conspicuous black chin and its whitish underparts. They have blackish
back and wings, and buff brown rump. A scaled pattern on back, nape and wings
coverts. The tail is blackish with buff median tail feathers. Underparts are
buff white. Flanks present scaly pattern forming a patch of bold black
chevrons. The crown is buff brown and nape shows scaled pattern. Chin is black,
and this colour extends to lores forming a black mask. Cheeks are whitish. These
birds have a strong conical bill which is bluish grey, eyes are dark brown and
the legs and feet are bluish grey. Sexes are similar.
Call
The call is a chattering
“chicker-chicker”, often given in flight.
Food
It mainly eats
seeds, supplemented with termites and other insects, foraging in large flocks
which pluck food from the ground.
Breeding
Breeding may
occur any time of the year and is closely linked to rainfall. They may skip
breeding during years when there is low rainfall. They build large compound
community nests, a rarity among birds. These nests are perhaps the most
spectacular structure built by any bird and are large enough to house over a
hundred pairs of birds. The nests are highly structured, the central chambers
retain heat and are used for nighttime roosting. The outer rooms are used for
daytime shade. Sociable weaver nests are used commensally by several other bird
species, most commonly the Pygmy Falcon.
Sociable weaver’s
exhibit delayed onset of breeding, sometimes up to two years of age. The female
lays between 2 to 6 eggs, which are incubated for between 13 to 15 days by both
sexes. The chicks are brooded continuously by both parents for the first 10 to14
days and are assisted with feeding the chicks by up to 9 helpers. They leave
the nest after about 23 days, remaining dependent on their parents for food for
between 30 to 45 days.
Conservation Status – Least Concern
Not threatened,
in fact its population has increased substantially over the past 100 years, as
it has moved into treeless areas where it uses artificial structures such as
electricity pylons and other man-made structures as nest sites.
Birdwatching
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