218 SYNOPSES AND ALPHABETICAL TNDEXS 
long, graceful and bold curves, apparently in an ecstasy 
of delight. Also ‘‘ Develin’ (a local name in Derby- 
shire and Yorkshire). The flight is very rapid (hence 
name) and easy, and often very high. It will go far 
from the nest to find food, which is insects exclusively, 
taken in the air as by its near relations. Flies some- 
times after dark. See Swallow, House Martin and Sand 
Martin (Synopsis), from which the general characteristics 
of swallow-like birds will be gathered. The swift is 
the largest of these that visit us. Length: 74 inches. 
Migratory : Arriving about the end of April or begin- 
ning of May, and leaving as early as August or Septem- 
ber. A few may remain till October. It is distinguished 
at once at a distance by its greater size, as compared 
with the other swallow family, especially in the wide 
expanse of wing. (The wing has aptly been called 
‘scythe ’-shaped when expanded, being narrow and 
pointed.) Also by its dull sooty black colour, uniform 
except for a small patch under the chin, and its very 
rapid powerful sweeping flight. They seldom or never 
perch on the ground, trees, or telegraph wires, and 
seem never to tire. It is found in the country rather 
than in towns, and is widely distributed. Nest: Often 
in high elevations as church towers, steeples, high cliffs 
or old quarries, but builds also in houses, and is fond 
of nesting under the thatch of a cottage. Built in May. 
Made of: Careless collection of straw and feathers 
