162 BIRDS OF OHIO. 
' 
223. (614.) IRIDOPROCNE BICOLOR (Vieill.). 79. 
Tree Swallow. 
Synonyms: Hirundo bicolor, Tachycineta bicolor. 
White-bellied Swallow, Blue-backed Swallow, Field Swallow, 
River Swallow, Wood Swallow, Green-blue Swallow, 
Black-and-white Swallow. 
Kirtland, Ohio Geol. Surv., 1838, 162. 
Dr. Wheaton reported this as a “Very common summer 
resident.” The only place where I have found it abundant 
was at Lewiston reservoir in July, where the birds 
swarmed about the multitudes of stumps in which they 
nested. Not even the English Sparrow ventured to disturb 
them there. In late July and early August the Tree Swal- 
lows roost in our northern marshes at night, or line the 
telegraph wires which pass such localities. They are 
abundant enough then, but where they have come from is a 
mystery. Certainly not from the immediate region, for they 
are not found except in small numbers during the summer. 
A few are willing to occupy the bird boxes-erected for them 
and the Martins and Bluebirds, but most of them prefer to 
cling to their primitive habits of nesting in hollow trees. 
The food differs from that of the other members of this 
group only in the difference in insects which naturally in- 
habit such regions as these swallows frequent a part of the 
year. During the weeks when the swallows are collecting 
for their southward journey they roost together in mixed 
companies of the several species, but one species usually 
predominates. 
The Tree Swallows arrive and depart with the Cliff Swal- 
lows. 
224. (616.) CLIVICOLA RIPARIA (Linn.). 80. 
Bank Swallow. 
Synonyms: Cotyle riparia, Hirundo riparia, Riparia riparia. 
Sand Martin, Sand Swallow. 
Kirtland, Ohio Geol. Surv., 1838, 162. 
The Bank Swallow shifts its breeding-places to suit local 
conditions and therefore may be reported as common at one 
