Sign up for our Free email Newsletter
and get all the latest wildlife news!
Choose:

Browse Old Articles


BROCHURE RACK

Long-tailed tit numbers increase sharply

10/03/2009 16:02:30 Boom times for Long-tailed Tits
March 2009. Although 2008 saw another poor breeding season for many birds, it proved to be a bumper year for one of our most endearing species. Participants in the British Trust for Ornithology's (BTO) Garden BirdWatch survey have seen a huge increase in Long-tailed Tits using their gardens, the biggest such increase since the scheme began.

The latest results to emerge from the BTO's Garden BirdWatch survey have revealed a massive increase in the use of gardens by Long-tailed Tits, a species that often visits gardens in extended family parties. The results, together with information drawn in from other BTO work, suggest that the Long-tailed Tit population has been boosted by a run of mild winters and a fantastic breeding season. During the last week of 2008 some 43% of the gardens covered by the survey held visiting Long-tailed Tits, compared to just 25% at the same time the previous year.

Earlier nesting
BTO research highlights a trend towards earlier egg laying by Long-tailed Tits, most likely in response to climatic changes, and this may have helped the birds avoid the damaging effects of the early summer rains that hit some of our other nesting species.

Long-tailed tits

Long-tailed Tits are an early breeding species with nest building initiated around March. What is interesting about these birds is their co-operative breeding technique, with many related individuals helping to rear chicks within the group. These birds do not use artificial nest boxes but prefer to construct their own elaborate nest domes. Each nest contains a precise lining of up to 2,600 feathers, all of carefully selected lengths, used to regulate nest temperature for incubating and brooding young. Researchers experimentally removing or adding feathers have found the birds able to recognise the interference and adjust their counting accordingly. The building process may take 39 days to complete.

This trend, plus a run of mild winters has allowed the population to increase and we are now seeing more of these birds using our gardens, visiting to feed on peanut fragments, fats and small seeds. Long-tailed Tits are small birds, weighing less than 10g. As such, they are particularly susceptible to severe weather and population numbers can crash dramatically during cold snaps. This is why the recent run of mild winters has helped them. Of course, the very cold snap earlier this year may have been very bad news for the tits, so it is important for garden birdwatchers to keep a close eye on their gardens over the coming months to see if, by turning to garden handouts, the Long-tailed Tits have been helped to survive the worst of the winter weather.

As Amy Lewis, Garden BirdWatch Development Officer, commented "These are remarkable birds and it's great to see them doing so well. Whilst it's nice to have some good news for a change the recent snow and ice may have hit them hard. We need people to join in and help us monitor their numbers this spring so that we can chart how they've fared. Garden BirdWatch is a nationally important project and is easy and fun to do."

 

Read the comments about this article and leave your own comment

To post a comment you must be logged in.
CLICK HERE TO LOG IN AND POST A COMMENT

New user? Register here

 

Click join and we will email you with your password. You can then sign on and join the discussions right away.