TWO HERONS 87 



have disiitited our progress more valiantly, and on 

 reacliiug the birds' stronghold, where the compara- 

 tive absence of undergrowth deprived our winged 

 foes of shelter, I congratulated myself on what, for 

 the moment, seemed to be no insignificant feat. 



The eleven nests which my guide had seen on a 

 previous occasion were found occupying their for- 

 mer positions, at least one hundred feet from the 

 ground in dead trees, one of which held five of the 

 eleven. During the many years which the birds 

 have nested in the place their number has not 

 varied, and one wonders what becomes of the from 

 thirty to forty young who doubtless each year leave 

 the parental trees. No other Herons of this species 

 are known to nest in the vicinity, and it is not prob- 

 able that the progeny of each year would seek a 

 nesting site in some far distant rookery ; conse- 

 quently, as an alternative explanation, we can only 

 suppose that the yearly product of the rookery bal- 

 ances its losses by death. 



The young birds were now nearly half grown, 

 but, unlike the Night Herons, they did not venture 

 outside their nests, from which they uttered harsh 

 croaks in evident supplication to their parents for 

 food. The sight of the trees in which the nests 

 were placed effectually controlled whatever ambi- 

 tions I had entertained toward camera studies at 

 short range, and I contented myself by making tele- 

 photos from the ground, in one of which an adult 

 bird and two nests, each with a young bird appear- 

 ing above its edge, may be seen." 



Time was lacking in which to observe these birds, 

 and the value of my visit to their retrea;t is not to 



