KEY TO PLATP:. 



Fig. 1 — Gibralta Rock from the south, Columbia 

 County, Wis. 



Fig 2 — Young Duck Hawks, removed from nest. 



Fig. 3 — Nesting ledge of Duck Hawk in Sauk 

 County, Wis. 



Fig. 4 — Gibralta Rock, showing commanding point 

 in center of picture, where Duck Hawk invariably alighted 

 on thir trips to and from the nest. 



