SHUFELDTl LIFE HISTORY OF THE BLACK SKIMMER 137 



Fig. I. Adult Black Skimmer in flight After Audubon. See Cover. 

 Fig. 2. Three eggs of the Skimmer. About one-half natural size 

 Fig. 3. A young Skimmer, a fortnight or more before it is able to fly- 

 Fig. 4. The subadult Skimmer, a short time before it is able to fly. Note 



how the bill in this figure and the one n Figure 3 differ from the beak 



of the adult bird. 



