52 THE BIRDS OF 



The small Green Heron (Plate 14, 

 p. in) is not half the size of the Great 

 Blue. This bird is green and blue with 

 rufous markings on the shoulders. Gen- 

 erally they live in. small marshes, but 

 last summer there were six of them at 

 Ravine Lake. Their call is very similar 

 to that of the Great Blue, as is also that 

 of the Black-crowned Night Heron, a 

 bird considerably larger than the Green, 

 but not equaling the size of the Great 

 Blue Heron. The Black-crowned Night 

 is silky white below, and gray and black 

 above, with a black crown. During the 

 nights of the spring and fall we often 

 hear the quawks of migrating Night 

 Herons, and as they fly low, we may pos- 

 sibly see them. 



OTHER FISH EATERS 



The food of the Osprey or Fish Hawk, 

 and of the Kingfisher, consists wholly of 



