GliEY-HEADED YELLOW WAGTAIL. 
169 
borders of inland pools and meres, and often on the 
boggy parts of heaths.” 
Whenever we noticed this species in Norway, and we 
did so in several instances, it was always upon heaths and 
marshes so wet and boggy, that it was with difficulty we 
could explore them. 
The nest of the Grey-headed Yellow Wagtail is formed 
of coarse grass, and those mosses which grow in wet situa¬ 
tions, strengthened by pieces of heath, and lined with 
fine grass and roots, moss and hair. 
Some of the eggs scarcely differ from those of our 
yellow wagtail; they, however, go through a greater 
variety of colouring, and are frequently much lighter 
than the figure, and sometimes a little darker. 
