BRANT. 



173. Branta bernicla glaucogastra. 26 in. 



Back brownish-gray. Rest of plumage 

 black and white as shown. Flight usually 

 without regular formation. 



Nest. A depression in the ground, lined 

 with feathers. Eggs buffy. 



Range. Breeds on Arctic islands. Win- 

 ters on the Atlantic coast from Mass., south- 

 ward. Rarely occurs in the interior. 



BLACK-BELLIED TREE DUCK. 



177.1. Dendrocygna autumnalis. 22 in. 



Head and neck gray and white. Breast 

 and back brownish. Belly black. 



Note. A loud shrill whistle. 



Nest. In cavities of trees. The six to 

 fifteen eggs are pure white. 



Range. Breeds in southern Texas, Mex- 

 ico and the West Indies. 

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