170 WET GROUND COMMUNITIES 
There are also a number of insects which live upon the vegetation 
and never go into the water. These are the blue and yellow moth 
(Scepsis fulvicollis), which is most characteristic, flies which breed in the 
water, such as horseflies (Tabanidae) (140), Tetanocera, etc., also midges, 
mosquitoes, dragon-flies, damsel-flies, May-flies, etc. These are asso- 
ciated with grasshoppers, such as Stenobothrus, Xiphidium, and various 
PERMANENT WATER MARSH AND ITS INHABITANTS 
Fic. 116.—General view of an open bulrush marsh at Wolf Lake. 
Fic. 117.—Similar but closer view of a marsh at Nippersink Lake, showing the 
yellow-headed blackbird (Xanthocephalus xanthocephalus Bonap.) perched on the 
bulrushes. Photo by T. C. Stephens. 
bugs and beetles which belong to drier places but which alight on the 
vegetation above the water. These will be discussed in connection with 
low prairie communities. 
The birds deserve especial attention (108, 141). The pied billed 
grebe, the black tern, and coot are especially aquatic. The grebe 
builds a nest from decayed floating rushes; its bottom is usually wet and 
the eggs commonly lie in moisture. The black tern builds a nest of 
