WAGTAILS. 521 
head and upper parts are streaked with brownish red, the throat 
yellowish grey, the breast dull brownish red, a- white spot on the 
wings, and the upper tail coverts yellowish red. ‘‘In April,” says 
McGillivray, “it forms its nest, generally under some furze bush, 
or other shrub, or among rank grass; it is formed of stems and 
blades of grasses, intermixed with moss, and lined with fine straws, 
Fig. 231.—The Willow Wren 
fibrous roots, hair, and wool, as well as feathers. These birds mani- 
fest intense anxiety should any one approach their nest, fluttering and 
flitting about, and incessantly emitting their sharp, snapping note, 
while endeavouring to lead the intruder off in pursuit of themselves.” 
Very much like the preceding in habits, and differing but slightly 
in appearance, is the Whin-chat (Pratincola rubetra). It, however, is 
migratory, which its predecessor is not. 
The Wartails (JZofaci#/a) are remarkable for their slender, elegant 
form ; the neck of moderate length; the head ovate, small, and 
S F 
