50 THE BIRDS OF THE BRITISH ISLES. 



lated like that of the Pochard, but it has a black head, and 

 the absence of wing bar prevents confusion with the rare White- 

 eyed Duck. Probably it is the carriage of the head and neck 

 of the Pochard which causes the impression that the bill has a 

 slight but distinct upward tilt, for in the hand this is no more 

 noticeable than in several other species. 



September or October are usually stated to be the months in 

 which the immigrant Pochards reach most districts, but of late 

 years some have been on Cheshire waters, which are much 

 frequented, early in August. Indeed, though so far the bird 

 has not been proved to nest in the county, a few at times remain 

 all summer. From year to year the numbers of winter visitors 

 varies, and during the season there is much fluctuation on any 

 particular water, at one time only a few small parties being 

 present, but at others hundreds or even thousands of birds. 

 The Pochard is sociable, and flocks move from water to 

 water. The flight is fairly quick and direct, but the rapid 

 movements of the short wings give the impression of greater 

 speed than is actually attained. When about to alight the 

 whole flock will suddenly slide down diagonally at great speed, 

 the wings producing a startling rushing sound, skim above the 

 surface, and enter with a splash. Diving ducks do not spring 

 clear like surface-feeders when rising, but beat along the water 

 for some distance like Coots, striking with wings and running 

 feet. The bird is, as a rule, in no hurry to rise, and when 

 approached draws off into open water, sinking its body until 

 the wavelets wash across its neck, and glancing back over 

 its shoulders as it swims swiftly away. With a httle care 

 it is possible to get close to a party feeding inshore. The 

 manner of diving varies individually, probably according to 

 the depth the bird desires to work ; at times the bird springs 

 up and with a graceful curve takes a header, but frequently it 

 slips below the surface, often kicking up a little shower of spray, 

 and swims so superficially that its under-water progress can be 



