© John Harding/BTO
Watch out for woodpeckers as their numbers are increasing.
As a garden bird enthusiast, there are few sights more captivating than a great spotted woodpecker flashing into view.
Sleek and dapper, they dart into gardens, alight at breakneck speed and feed in improbably acrobatic positions.
The good news for fans of great spotted woodpeckers is that their numbers are on the up.
The year-round BTO Garden BirdWatch survey reveals that their numbers around our homes have increased by almost 50 per cent since 2003, with new areas in Scotland and Ireland being colonised.
What’s more, the survey shows that June is the best month in which to see them.
Householders might be lucky enough to host whole families of great spotted woodpeckers over the next few weeks.
Average number of great spotted woodpeckers seen per garden over the past three years (data from BTO Garden BirdWatch). Photo is of an adult male great spotted woodpecker (right) and a fledgling (left) – Jill Pakenham/BTO.
Youngsters are ushered by their parents into gardens; a behaviour that is designed to help these fledglings towards independence, showing them where to find a reliable meal. It is a strategy that seems to work.
Garden BirdWatch records show that fledgling great spotted woodpeckers tend to be accompanied by their parents during early June but then, later in the month, arrive alone.
This year, however, a slightly different pattern is likely to emerge.
The tardy arrival of spring means that great spotted woodpeckers, like most other birds, will almost certainly be nesting a little later than normal this year.
As such, family groups might be more commonly seen in gardens during mid-late June, with lone youngsters being spotted well into July.
Drumming for a meal
Great spotted woodpeckers are amongst the head-bangers of the avian world.
They drum on trees and other resonant surfaces during early spring to mark out their territories, and rely upon similar motion to prise out wood-dwelling invertebrates, break open conifer cones and to chisel peanuts from mesh feeders in gardens.
Such violent impacts would result in concussion in people, so how do great spotted woodpeckers manage them?
The answer is that they have evolved sophisticated ‘shock absorbers’ where the beak joins the skull.
Any stresses are transmitted towards the centre of the brain, which helps to prevent it from rotating, which would lead to concussion.
Their ability to handle such extreme impacts has made the great spotted woodpecker the subject of research into ways to reduce the risk of human head injuries.
Great spotted woodpeckers take a wide variety of foods in gardens, happily hammering peanuts, chiselling suet-blocks or clearing trays of mealworms.
As long as they can get a good grip on a feeder and can reach the food inside, they will sample most things.
A great spotted woodpecker’s tongue can protrude some 40mm beyond the tip of its bill – so not many garden bird foods are out of their reach.
How to spot a great spotted woodpecker
Identifying a great spotted woodpecker is relatively easy.
There are just two black and white woodpeckers in Britain: the great spotted woodpecker and the lesser spotted woodpecker.
The former are about the size of starlings and are fairly widespread, while the latter are only about the size of greenfinches and are worryingly – and increasingly – scarce.
When perched, the great spotted woodpecker has two large white shoulder patches whereas the lesser spotted woodpecker has several white bars.
Lesser spotted woodpeckers also lack pale red under-tail coverts, which are akin to red underpants, which great spotted woodpeckers have.
Juvenile great spotted woodpeckers can be distinguished from adults of the same species by the presence of a red skull cap and pale red under-tail coverts.
Adult great spotted woodpeckers, by contrast, have a black skull cap and bright red under-tail coverts.
Adult males can be distinguished from adult females through the presence of a small rectangle of red feathers on the back of the head.
The British Trust of Ornithology (BTO) works in partnership with over 40,000 volunteer birdwatchers to chart the fortunes of UK birds.
Among the surveys that we coordinate is our popular Garden BirdWatch, the largest year-round survey of garden birds in the world.
Each month we highlight a bird for you to look out for in your garden.
For more information about Garden BirdWatch or to speak to the Garden Ecology Team please email firstname.lastname@example.org
Read previous BTO Garden Bird of the Month blogs.