Idemili is the
first female cuckoo to have a satellite tag fitted. She joins five male birds
that have been tagged in Wales.
She is an adult of at least two years of age and was caught in the Brechfa Forest,
Carmarthanshire, Wales,
on 10th June 2012. Idemili was named by Essex & Suffolk Water after the
river goddess of the African Igbo religion in Nigeria, a region where the Cuckoos
spent some of the winter in 2011/12.
After spending a
month at her tagging location in Brechfa
Forest, Idemili followed her male
colleagues and moved eastwards to Surrey. She
was in Wales on the evening
of 9th July and we next heard from her in Surrey
on the morning of 11th July. We thought all was well but received a phone call
on 13th July from the Wildlife Aid Foundation in Leatherhead to say she had
been picked up on 12th July in a garden in Tolworth, Surrey.
She was underweight and had some wounds to her wing and some feathers were
missing from her head indicating she had been attacked by another bird. She
survived the night and is taking mealworms, crickets and water so there is hope
that she will recover. While the bird hospital have confirmed that she shows no
evidence of damage from the tag, Dr Chris Hewson, lead scientist on the project
at the BTO, visited Idemili on 14th July to remove her tag while she
recuperates, and to assess her physical condition. She is in excellent hands at
the hospital and we will be keeping a close eye on her as she recovers.
The Common
Cuckoo
The Common Cuckoo - Cuculus canorus – formerly European Cuckoo is a widespread summer
migrant to Europe, Asia and winters in Africa. Breeds across Eurasia, in the
non-breeding season it heads south it to sub-Saharan Africa.
Description
Adult males are
slate-grey with barred underparts. The iris, orbital ring, the base of the bill
and short legs and feet are yellow. Grey adult females have a pinkish-buff or
buff background to the barring and neck sides. Rufous phase adult females have
reddish-brown upperparts with dark grey or black bars. Common Cuckoos in their
first autumn have variable plumage. Some are have strongly-barred chestnut-brown
upperparts, while others are plain grey. Rufous-brown birds have heavily-barred
upperparts with some feathers edged with creamy-white.
Call
The male's call,
goo-ko, is usually given from an open perch. The female has a loud bubbling
call.
Food
Diet consists of
insects, especially hairy caterpillars.
Breeding
Common Cuckoos
first breed at two years old. The Common Cuckoo is a brood parasite. It lays
its eggs in the nests of other birds. At the appropriate moment, the hen cuckoo
flies down to the host's nest, pushes one egg out, lays an egg and flies off.
The whole process takes about 10 seconds. A female may visit up to 50 nests
during a breeding season. The chick hatches after 11–13 days. It methodically
evicts all host progeny from host nests. It is a much larger bird than its
hosts, and needs to monopolise the food supplied by the parents. The chick will
roll the other eggs out of the nest by pushing them with its back over the
edge.
Conservation Status – Least concern
Not threatened,
in fact it is widespread and common in Southern Africa.
In the UK
a marked decline in numbers.
Birdwatching
Cuckoos can be
seen throughout the UK, but
are especially numerous in southern and central England. Adults arrive in late
March or April and depart in July or August, with young birds leaving a month
or so later.
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