In the South West of England such behaviour has earned the Eurasian blue tit the colloquial nickname " Little Billy Biter ".
32.
Male blue tits have an ultraviolet reflective crown patch which is displayed in courtship by posturing and raising of their nape feathers.
33.
The amount of eggs laid also varies : for example, the kiwi lays just one, whereas the blue tit will deposit many.
34.
A study by Lancaster University found that when covered in wire mesh, only 1 out of 48 blue tit nest boxes were predated.
35.
One can watch the blue tits and swallows inside their nests, and take in the panoramic vista of the rolling Angus countryside and hills.
36.
But researchers from Montpellier, France, studying blue tits on Corsica, found that for two populations of the birds the island was hardly a melting pot.
37.
Monica joined the Edward Grey Institute of Field Ornithology, Oxford in 1948 to conduct research on the foraging behaviour of great tits and blue tits.
38.
Comparison of the birds'DNA showed that all chickadees and titmice share a common ancestor and that the great tits and blue tits are more distant relatives.
39.
A study looked at the effect on the population of blue tits in an area where a pair of Eurasian sparrowhawks began to breed in 1990.
40.
Work by Gorissen, Gorissen, and Eens ( 2006 ) has focused on blue tit song matching ( or, " song imitation " ) by great tits.
