186 Wisconsin Academy of Sciences, Arts and Letters. 



12. Astur atricapillus, (Wils.) Bp. 



Goshawk. 



13. Archibuteo lagopus f ancti-johannis, (Gm.) Ridg. 



Rough-legged buzzard. 



Class TV. Birds that are migratory, but whose move- 

 ments, with those of Class III., are influenced to a great 

 extent by immediate changes of temperature. In this 

 class the southward movement is deterred until the freezing 

 of our bays and rivers. Pot hunters for many seasons past 

 have taken most of the following species, up to the very day 

 of freezing up : 



1. Fulica amerieana, Gm. 



Coot 



2. Chen byperboreus, (Pall.) Boie. 



Snow goose. 



3. Bernicla canadensis, (L.) Boie. 



Canada goose. 



4. Haliaetus leucocephalus, (L.) Savig. 



Bald eagle. (Breeds). 



5. Bernicla canadensis hutchinsi, (Rich.) Coues. 



Hutchin's goose. 



6. Fuligula marila, (L.) Steph. 



Greater black head. 



7. Fuligula affinis, Eyt. 



Lesser black head. 



8. Fuligula coUaris, (Donov.) Bp. 



Ring neck duck. (Breeds Outagamie Co.) 



9. Fuligula ferina amerieana, (Eyt.) Coues. 



Red head. 



10. Fuligula vallisneria, (Wils.) Steph. 



Canvas back. 



11. Clangula glaucium, (L.) Brehm. 



Golden eye. (Breeds Outagamie Co.) 



12. Clangula albeola, (L.) Steph. 



Buffle hf ad. 



13. Harelda glacialis, (L.) Leach. 



Long tailed duck. 



