100 



THE RIVER-SIDE NATURALIST. 



with a less defined white mark over the eye, and of a slightly 

 more sombre green plumage, the CHIFF-CHAFF (Phyllosco- 

 pus collybita), whose cheerful monotonous song of Chiff- 

 chaff, chiff-chiff chat, often repeated, may be heard on the 



THE WILLOW-WARBLER. 



tops of the highest trees when the hazels are covered with 

 their catkins and the sallows with their down. It is, with 

 the exception of the gold-crest, one of our smallest migrant 

 warblers, as well as one of the earliest to arrive. The 



