Garden Birdwatch

Spring has deffinitely arrived! The weather this month was typical of April - sunshine and showers. The birds have started to pair up and build nests. Our garden has plenty of suitable nesting materials in it - dried grass stalks, loose twigs, dried leaves, moss, wet clay/mud from the pond and wool fibre from hanging basket liners. There are also nest boxes and ivy clad fences, mature evergreen bushes, trees and a native hedge, all of which provide good nesting sites. The birds have certainly made good use of the nesting materials from our garden but sadly they all seem to have built their nests in neighboring gardens, apart from a wren. Previosu years we have had robins, blackbirds and great tits nesting in our nest boxes and bushes. Still, it is exciting to watch them gathering the nesting materials in a furtive, industrious and even comical manner (especially the starlings).

In spring it is particularly important to provide a wide selection of foods and fresh drinking water for the birds and to keep feeding stations and waterbaths clean. That is necessary to keep the breeding adults in tip-top condition and have a ready source of food for feeding the nesting female, the young birds in the nest and later on the fledgelings. As the month wore on and it got milder, more insects were available to feed the insectivorous birds but they still benefit from extra worms, dried or live, being provided too.

It is necessary to provide good shelter (trees and bushes) to protect the birds both from the weather and from the local cats who invade our garden. Cats are a big problem and can scare off the birds in the garden and even kill them. While we can accept birds being killed for food by birds of prey like sparrowhawks and kestrels or foxes, cats seem to treat their prey as a toy rather than food. They sometimes also try to eat the food put out for birds! Do they not get properly fed by their owners? Cat owners should be more responsible, especially in the spring and early summer when young birds are around. If you own a pet cat, try to keep it inside, especially after dusk, to reduce the danger to birds.

The photograph is of a male blackcap in a Mahonia bush.

juvenile blackbird moulting into adult plumage


The British Trust for Ornithology (BTO) have been running a garden birdwatch since 1995.

The idea is simple - volunteers throughout the U.K. keep a note of the numbers of each species they see in their own gardens each week.

Here are the results from our own small suburban garden for last month:

Species Week Commencing
2007-03-30 2008-04-06 2008-04-13 2008-04-20 2008-04-27
Blackbird 2 2 1 3 2
Blackcap 1 1 1
Black Headed Gull
Blue Tit 3 1 1 1 2
Chaffinch 2 1 2 1 1
Chiff Chaff
Coal Tit
Collared Dove 2 1 2 3 3
Crow  
Dunnock 2 1 2 2 2
Feral Pigeon
Garden Warbler  
Goldcrest  
Goldfinch 3 3 3 2 3
Great Tit 1 2 4 2 1
Great Grey Heron  
Greenfinch 3 2 3 2 3
House Sparrow 4 5 5 6 5
Jackdaw
Kestrel
Linnet
Long-tailed Tit 2 1
Magpie 2 2 1 1
Merlin
Mistle Thrush      
Pied Wagtail      
Robin 2 2 2 2 2
Siskin  
Song Thrush    
Sparrowhawk    
Spotted Flycatcher      
Starling 3 2 2 3 2
Stock Dove    
Swallows      
Swifts  
White Dove 3 3 3 3
Wood Pigeon 3 2 2 2+1* 2
Wren 1 1

(Previous months results are here)

The numbers are the maximum number of a species we saw feeding at the same time (for our own records, we show newly fledged young with a * but we just send the grand total to the BTO). All the volunteers enter the numbers onto computer-readable cards which are sent back to the BTO each quarter.

What do these numbers tell us? Well, the statistics for a single garden don't give a balanced picture, of course. But from the combined results (representing now around 16,500 gardens) statistics are compiled which show how the populations of each species are affected by seasonal changes and other environmental factors.

Having said that, we have ourselves noticed some trends which have shown up nationally. These include an increase in visits from the delightful Long-tailed Tits and goldfinches, the decline in numbers of sparrows and starlings and relatively frequent appearances of Blackcaps (generally thought of as a summer bird) in winter.

More detailed surveys (perhaps including ringing) can then shed light on these trends: for example, the winter Blackcaps have been shown to be completely different birds to the summer ones: as one "shift" leave the British Isles for warmer places in Autumn, another "shift" arrives!

We've been recording our birds for five years now (three years statistics are on this site). It's brought us a lot of pleasure, and we've learnt a lot, too.

So... you're very welcome to keep an eye on the birds in our garden here, or better still - join in and watch your own!

To contact the BTO:

email:

gbw@bto.org

website:

http://www.bto.org/gbw/index.htm

Also: For people interested in watching bird migration, and how it effects the summer and winter visitors to your garden visit http://www.bto.org/migwatch.

by post:

Garden Birdwatch
BTO
FREEPOST
The Nunnery
Thetford
Norfolk
IP24 2PU

Fax: 01842 750030
Tel: 01842 750050

For more information, see the Garden Birdwatch Home Page, or visit the BTO's main web site at: www.bto.org.

Garden birdwatch is supported by participant's contributions and by C J Wildbird foods Ltd.

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Last updated: 19February2008

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