CYPSELID&. 261 
THE SWIFT. 
CypseLus Apus (Linnzus). 
The Swifts, with which we enter upon the Order Picar1#, were 
formerly placed among the Passeres, and close to the Swallows ; 
but it is now generally admitted that in spite of a similarity in 
habits and appearance, the Swifts have as little structural affinity 
with the latter as with any other Passerine family. They have no 
true song-muscles, and their note is a harsh scream. Their powerful 
wings are very long; while their four toes are directed forward, 
and, though well adapted for clinging, are so small that walking is 
difficult. Contrary, however, to the popular belief, birds sometimes 
succeed in raising themselves from fairly level ground. 
The Swift, often called “Screecher” and “ Deviling,” is an 
abundant migrant to the British Islands. It usually makes its 
appearance in the south towards the end of April; but Prof. 
Newton and his brother, the late Sir Edward Newton, observed a 
Swift near Lowestoft as early as March 26th 1897. The majority 
have taken their departure by the end of August, but laggards have 
been recorded up to October, November and even December rst. 
