206 APPENDIX, 



BLUE OR BLUE-GRAY BIRDS. 



A. Larger than a Robin. 



a. Wings and tail marked with black and white \ 



collar black. Seen in trees. Blue Jay. 



b. No black ; collar white. Seen flying over 



water or near it. Kingfisher. 



B. Smaller than a Robin. 



a. Entirely blue, except brown wings and tail. 



Bird the size of a sparrow; seen on the 

 tops of trees or in thickets. (Female 

 brown.) Indigo Bird. 



b. Breast chestnut. Larger than a sparrow. 



Seen in orchards or near country houses. 

 Bluebird. 



c. Blue-gray ; under parts white ; tail short. 



Seen on the trunks or large limbs of 

 trees, often with head downward. Nut- 

 hatch. 



