Woodland birds down in number
A big drop in the population of long-distance migrant birds has been uncovered in a new survey.
Species such as the tree pipit and the spotted flycatcher fell by 70 per cent in some areas.
It is a similar story for the willow warbler, down an average of 75
per cent, the wood warbler, down 64 per cent and the garden warbler
down by nearly 40 per cent in some places.
The Repeat Woodland Bird Survey, just published, is part of the most
comprehensive poll of woodland birds for more than 20 years, and
involved the British Trust for Ornithology and the Royal Society for
the Protection of Birds.
It is not clear if the decline is related to their journey to warmer
climates in Africa or if there are problems in the countries where they
spend the winter.
Other species showing a national decline were the lesser redpoll, the lesser spotted woodpecker and the willow tit.
It is not all bad news, though, are some birds are thriving,
including the blackcap, chiff-chaff, goldcrest, robin, tree creeper and
wren.
Among residents and mid-distance migrants, there were some
unexpected success stories with signs that coal tits, blue and great
tits are showing continuing growth.
There is also good news for green and great spotted woodpeckers but
there relative, the lesser spotted woodpecker, is in decline.
The report reveals regional differences with a trend for more
general declines in the south and east of Britain than the north and
west.
The reasons may be linked to changes in weather patterns, changes to woodland areas, and the impact of deer and grey squirrels.
Jim Knight, biodiversity minister, said of the report: "Woodland
birds are a vital part of our natural heritage. While some of the birds
featured in this report are familiar to us from back gardens and parks,
others like the willow tit and tree pipit, are less common and are
becoming rarer."
Mr Knight said he was pleased that the results would help to shape further work on the protection of species.
"It gives us clear scientific evidence for these changes," he said.
The research was commissioned and funded by Defra, the Forestry
Commission, the RSPB, BTO, the Woodland Trust, and English Nature.
A conference on the changes in the woodland bird populations will be
held in Leicester during April when the decline of many species is
likely to be high on the agenda. |