44 



ILLUSTRATIONS 



Opposite page 



Plate 1 43 



Fig. 1. — Renwick Marsh and the head of Cayuga Lake from West 



Hill during the March floods. 

 Fig. 2. — The same during the middle of May. 



Plate II ; 48 



Map of Renwick Marsh and Cayuga Lake. 



Plate III 53 



Map of a portion of Renwick Marsh, showing plant societies and 

 distribution of birds' nests. 



Plate IV 59 



Fig. 1. — Head of Caynga Lake, showing the Shore-line Associ- 

 ation exposed during the drought of late summer. 

 Fig. 2. — West Marsh, showing an extensive uninterrupted area 

 of the Cat-tail Association. 



Plate V 66 



Fig. 1. — The Grass Association with the Alder-willow in the 



background. 

 Fig. 2. — The Alder-willow Association fringing a pond filled with 

 spatter-dock. 



Plate VI 69 



Fig. 1. — The Sedge Association with the Maple-elm in the back- 

 ground. 

 Fig. 2. — The Maple-elm Association and Fall Creek. 



Plate VII 73 



Zonal distribution of marsh birds. 



Plate VIII 79 



Fig. 1. — Migrating Redwings, illustrating the irregular form of the 



flock. 

 Fig. 2. — ^A pair of Redwings hovering above the nest. 



Plate IX ; 96 



Fig. 1. — Nest built during late April, between the dead cat-tail 



stubs. 

 Fig. 2. — Nest built during early May, between dead stubs and 

 growing vegetation. 



Plate X 97 



Fig. 1. — Nest built in the cat-tails during late May, showing the 



altitude above the water. 

 Fig. 2. — Nest in arrow arum in early June. 



Plate XI 98 



Redwings near the nesting site, illustrating their method of perch- 

 ing on the vertical cat-tails. 



