40 



YEARBOOK, PUBLIC MUSEUM, MILWAUKEE. 



[Vol. I. 



bluffs abutt on the river, the beautifully modeled precipitous rock faces 

 rising sheer a hundred or more feet above the water. 



It was here that we obtained incomplete Duck Hawk material in 

 1911, and in a pouring rain Mr. Laws and I located another set of three 

 eggs on a bare ledge on the first of these cliffs known as Ferry Bluff. 

 This crude nest is shown in figure 20, while the cliff itself is shown in 

 figure 21. As a nesting of the Duck Hawk is a rare "find" in Wiscon- 

 sin, a careful watch was kept on the eyrie. Two newly hatched young 



Fig. 21. — Collecting young Duck Hawks on a ledge on the face of Ferry- 

 Bluff, Sauk County, Wis. Photo bj' W. D. Richardson, Chicago. 



(one unfortunately had been crushed in some manner and probably 

 spoiled for mounting), one addled egg and a beautiful male falcon were 

 collected on May 15th. First, however, the site and young had had been 

 well photographed by Mr. W. D. Richardson, who made a trip from 

 Chicago for the purpose. Some of these negatives, which were very 

 difficult to secure, he very kindly turned over to us. Figures 20 and 21 

 are reproduced from photographs made by ]\Ir. Richardson at this time. 

 A rope, borrowed from a neighboring farmer, had been used on our 

 trips to the ledge. With Mr. Laws above to handle the ropes, as in 1911, 



