April sees the start of the breeding season
for many birds in the Algarve, none more remarkable than the Azure-winged
Magpie, which is strongly defying predictions that it may be facing extinction.
About the size of a blackbird but appearing
bigger because of its multi-coloured body and much longer tail, the
Azure-wing’s brash and boisterous behaviour also make it easy to spot.
Male and female are identical in
appearance and they remain gregarious even though winter flocks are now loosening.
Young couples, as well as monogamous
pairs that have already bonded for life, will this month be
home-building on the basis of a single new nest per tree.
In Europe, Azure-wings occupy the southwest
corner - the Algarve, southern Alentejo and the neighbouring Spanish province
of Andalusia. They are found nowhere else except on the other side of the world
- in China, Korea and Japan.
Pleistocene fossil evidence has ruled out
any notion that exotic Azure-wings were imported from the Far East by early
Portuguese explorers. The resident European and East Asian populations were
slowly split apart a million or more years ago with the advance of the last Ice
Age.
Once fairly scarce in the Algarve, they are
now flourishing in woodlands, parklands and orange groves all across the
region.
Their numbers seem to be ever increasing despite
an ominous study published some years ago in the international science journal Nature.
Researchers forecast that a quarter of all
land and plant species in the world might be driven to extinction if greenhouse
gas emissions were not drastically reduced.
The authors of the study named the Azure-winged Magpie as one of the top ten climatically
threatened bird species in Europe.
The study predicted a loss of
between 50% and 95% of the Azure-wings, depending on their ability to disperse
and occupy suitable new areas in response to habitat changes brought about by
global warming.
While
even now they do not care for sparsely vegetated, wind-swept areas and would be
forced out by desertification, Azure-wings are extremely adaptable when it
comes to diet.
In
addition to all sorts of creepy-crawlies foraged from trees, bushes and the
ground, they enjoy fruits and nuts and are thus regarded by some farmers as a menace.
Their
popularity is also tainted by the fact that they will take eggs and young from the
nests of song birds.
Their
audacity commonly stretches to swooping into gardens and backyards to raid
kitchen scraps or leftover biscuits in cats’ and dogs’ bowls. Cheeky, but as
Darwin explained, it’s the most adaptable and fittest that survive.
While
aggressive in some ways, Azure-wings within their own communities show
compassion. Individuals within loose breeding colonies help each other with
nest building, supplying food to incubating females and feeding fledglings.
Along
with other fellow members of the crow family, this is one of the brainiest
species in the bird world. Its brain-to-body ratio equals that of the great
apes, whales, dolphins and porpoises. It’s only slightly less than ours.
Extinction?
Not in our lifetime!
Photo
taken in the Algarve by Colin Key