BIRDS OF ONTARIO. 39 
Abundant resident in Southern Ontario, summer resident in the 
northerly portions of the Province ; breeds throughout its range. 
Famity ICTERIDA. Buackpirps, Orioies, Erc. 
GENUS DOLICHONYX. 
189 Bobolink. 
(Dolichonyx oryzivorous.) 
Abundant summer resident, breeds in the hay meadows through- 
out its range, which does not extend north of the cultivated country. 
Arrives about the 10th of May, departs about the end of August. 
Genus MOLOTHRUS. 
190. Cowbird. 
(Molothrus ater.) 
An abundant summer resident, deposits its eggs in the nests of 
other small birds, breeding throughout its range. 
Arrives about the first of April, departs early in October. 
This is the most injurious bird we have. as each egg deposited by 
it means the destruction of a whole brood of one of our beneficial 
species. 
Genus XANTHOCEPHALUS. 
191. Yellow-headed Blackbird. 
(Xanthocephalus xanthocephalus.) 
A very rare summer visitor from the western prairies. 
Genus AGELAIUS. 
192. Red-winged Blackbird. 
(Agelaius phceniceus) 
A very abundant summer resident, breeding in marshes throughout 
its range. 
Arrives about the middle of March, departs about the middle of 
October. 
Genus STURNELLA. 
193. Meadow Lark. 
(Sturnella magna.) 
A common summer resident in southern Ontario, gradually extend- 
ing its range northward as the land is cleared. Breeds on the ground 
in meadows throughout it range. 
Arrives towards the end of March, departs late in October or early 
in November. 
