rAuk 



448 Cooke, Bird Migration in the Mackenzie Valley. [bet. 



fuscicollis, Ereunetes pusillus, Bartramia longicauda, Falco s. spar- 

 verius, Colaptes auratus lutcus, Tyrannus tyrannus, Empidonax 

 miminus, Agdaius phceniceus fortis, Quiscalus quiscula ceneus, 

 Vireosyha olivacea, Mniotilta varia, Vermivora c. celata, Vermivora 

 peregrina, Dcndroica striata, Setophaga ruticilla, Hylociclda ustulata 

 swainsoni, and Planesticus m. migratorius. 



Fig. 3. Red-eyed Vireo (Vireosyha olivacea). 



They present some of the most interesting problems in the study 

 of bird migration. In the case of the Red-eyed Vireo, the species 

 breeds along the whole northern tier of states west to Washington", 



