Backyard
ornithologists chart disappearance of 44m birds
The
UK's bird population has plummeted by 44 million in four decades,
according to a study carried out with the help of volunteer
ornithologists.
18
November, 2012
The
dramatic decline in numbers - equivalent to one for every person in
England and Wales - has been caused by changes in farming methods and
the weather, conservation groups say.
Figures
collated by organisations including the Royal Society for the
Protection of Birds and the British Trust for Ornithology found that
the number of nesting birds has slumped from 210 million in 1966 to
166 million.
In
their report, The State of the UK's Birds, they warn that while
numbers for some species, such as the house sparrow, show signs of
recovery, further declines are inevitable as birds cope with changes
to the environment and conservationists battle for investment in
wildlife-friendly farming to be maintained. There is particular
concern that spending on wildlife protection in Britain will be
disproportionately slashed as a result of cuts in the EU budget this
week, with the monitoring of the health of the bird population
dependent on continued support from volunteer birdwatchers.
"The
State of the UK's Birds report is a great example of 'citizen
science' in action," said Dr Tim Hill, Natural England's Chief
Scientist. "Most of the information upon which the report is
based is derived from the efforts of the nation's network of skilled
volunteer ornithologists who contribute to national monitoring
schemes."
Dr
Andy Musgrove, of the BTO, said: "There is still more to learn,
though, and we need the continuing support of ever greater numbers of
volunteer birdwatchers, on whose efforts all of these numbers are
based."
The
21 per cent drop in Britain's birds is equivalent to the loss of a
single breeding pair every minute for the past 46 years, with species
including the house sparrow, turtle doves and the wren suffering
steep declines.
The
differing fates of two dove species encapsulated the shifting
fortunes of the UK's birds. There are estimated to be only 14,000
breeding pairs of turtle doves, a significant drop from their 140,000
peak in 1966. Despite coming to Britain only in 1955, there are now
one million collared doves.
"Our
bird population has been on a rollercoaster ride and it will
continue," said Grahame Madge, of the RSPB.
The
damage to habitats from change of land use and management of the
countryside is thought to be behind much of the decline. Cold winters
have also had a dramatic effect.
The
bulk of UK spending on conservation linked to farmland, about £243m
a year, comes via the Common Agricultural Policy. But up to 20 per
cent could be cut from the EU's rural development budget, which
conservationists say would be disastrous.
Flying high? population change,
1970-2010
Going
down
Corn
bunting: Known
as the fat bird of the barley, a change in cropping patterns and
practices have severely affected its numbers. Down
90 per cent to
11, 000 pairs.
Lesser
spotted woodpecker: About
the size of a sparrow, it requires extensive high quality woodlands
and they are now few and far between. Down
70 per cent to
1,500 pairs.
House
sparrow: The
iconic and enigmatic sparrow continues to be overall decline. A
shortage of food seems to be part of the problem. Down
64 per centto
5,300,000 pairs.
Lapwing: Has
suffered historically through the loss of suitable habitats, with the
drainage and conversion of marginal land into farmed land. Down
56 per cent to
140,000 pairs.
Kestrel: One
of our most familiar birds of prey. Its decline may be linked to the
loss of marginal habitat and the associated decline in the numbers of
small mammals. Down
44 per cent to
46,000 pairs.
Going
up
Greater
spotted woodpecker: This
highly adaptable and robust woodpecker is doing well, taking
advantage of increasing bird feeding in gardens and, perhaps,
increasing amounts of woodland. Up
368 per cent to
140,000 pairs.
Collared
dove: First
bred in the UK in around 1955. Its spectacular rise across Europe
remains something of a mystery, but seems to be related to its
ability to adapt and live with humans. Up
333 per cent to
990,000 pairs.
Red
kite: Once
abundant across much of the UK, this spectacular bird of prey is
making its way back thanks to a series of highly successful
reintroduction projects. Up
575 per cent to
1,600 pairs (1995-2010 figures)
Blackcap: A
small warbler whose adaptable nature has allowed it to buck the trend
in recent times compared with close relatives, with an increase in
numbers. Most warblers migrate to Africa and many of these are in
decline, but the clever blackcap is increasingly staying closer to
home in Europe. Up
222 per cent to
1,200,000 pairs.
Nuthatch: Like
the greater spotted woodpecker, the nuthatch may be benefiting from
an increasing amount of woodland in the environment and perhaps from
climate change. Up
232 per cent to
220,000 pairs.

No comments:
Post a Comment
Note: only a member of this blog may post a comment.