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Despite its dramatic folk name as 'the harbinger
of death', the barn owl is stunningly handsome and one of the most evocative
of all our Suffolk birds, as Mick Wright explains.
As
daylight gives way to dusk, a ghostly silhouette silently slips
over a hedge to sally effortlessly over rough grassland in search
of unsuspecting prey. When darkness finally blankets the end of
the day a mind-curdling, eerie, drawn-out screech penetrates the
farmland. A bird of the night - the time when evil deeds are done
- it is no wonder that in folklore the barn owl won the reputation
(fully undeserved!) as the 'harbinger of death'.
During the early 1900s the barn owl was thought to be
well distributed and considered to be the most common of the owls. However,
from around 1945 numbers fell dramatically. The owls' favourite haunting
grounds include rank grassland where it finds its quarry of small mammals
such as voles, mice and shrews. However, since 1939 a hefty 96% of Suffolk's
unimproved grassland has been lost. This has been due to the fragmentation
of rough grassland, caused by modern agriculture, and the intensive
management of field margins, watercourses, hedgerows, woodland edges
and roadside verges. It is this loss of habitat that has largely been
to blame for the barn owls' decline.
A reduction in farmyard foraging due to improvements in
the methods of handling grain and the lethal effects of organochlorine
pesticides have also taken their toll. The construction of major new
road networks not only fragmented habitat but also enabled traffic to
travel faster, resulting in more road deaths.
The bird is predominately sedentary and may breed in almost
any month of the year. Although no nest is actually built, the nesting
site - which may be situated in a hollow tree or appropriate building
(such as the traditional farm barn) - is reused each year. Usually between
four and seven eggs are laid and, in years where prey like voles are
plentiful, there may be a second brood. The young are cared for and
fed by both parents and become independent between three and five weeks
after fledging.
Results of a recent survey of breeding raptors and owls
conducted by the Suffolk Ornithologists' Group between 1995 - 1998 suggest
an increase in the number of breeding barn owls, which is great news.
Today there is estimated to be around 90 breeding pairs - a vast improvement
on 1971 when there were only eight pairs in Suffolk! Almost every observation
has been made within a river corridor and there was a distribution bias
towards the east of the county.
As one of Suffolk's characteristic species, targets for
the barn owl have been included in Suffolk's Biodiversity Action Plan
to stimulate conservation action. In order to make sure the owls' recovery
continues, the county's remaining rough grassland must be protected,
more suitable habitats created and restored, sympathetic farmland practices
of headlands, field margins and wildlife corridors encouraged and, of
course, awareness of the needs of the barn owl promoted. To see this
owl recover its former numbers throughout Suffolk is a challenge worth
striving for. It is up to each and every one of us to help.
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