They are found in abundance in all the grassy meadows or rushy marshes of Illinois and Wisconsin, where they breed in large communities. In swamps overgrown with tall rushes, and partially overflowed, they construct their nests just above the water, and build them around the stems of these water-plants, where they are thickest, in such a manner that it is difficult to
discover them, except by diligent search, aided by familiarity with their habits.
In Texas Mr. Dresser met with a few in the fall, and again in April he found the prairies covered with these birds. For about a week vast flocks remained about the town, after which they suddenly disappeared, and no more were seen.
In California, Dr. Cooper states that they winter in large numbers in the middle districts, some wandering to the Colorado Valley and to San Diego. They nest around Santa Barbara, and thence northward, and are very abundant about Klamath Lake. They associate with the other Blackbirds, but always keep in separate companies. They are very gregarious, even in summer.
Dr. Cooper states that the only song the male attempts consists of a few hoarse, chuckling notes and comical squeakings, uttered as if it was a great effort to make any sound at all.
Dr. Coues speaks of it as less numerous in Arizona than at most other localities where found at all. He speaks of it as a summer resident, but in this I think he may have been mistaken.
In Western Iowa Mr. Allen saw a few, during the first week in July, about the grassy ponds near Boonesboro’. He was told that they breed in great numbers, north and east of that section, in the meadows of the Skunk River country. He also reports them as breeding in large numbers in the Calumet marshes of Northern Illinois.
Sir John Richardson found these birds very numerous in the interior of the fur countries, ranging in summer as far to the north as the 58th parallel, but not found to the eastward of Lake Winnipeg. They reached the Saskatchewan by the 20th of May, in greater numbers than the Redwings.
Through California, as well as in the interior, Mr. Ridgway found the Yellow-headed Blackbird a very abundant species, even exceeding in numbers the A. phœniceus, occurring in the marshes filled with rushes. This species he found more gregarious than the Redwing, and frequently their nests almost filled the rushes of their breeding-places. Its notes he describes as harsher than those of any other bird he is acquainted with. Yet they are by no means disagreeable, while frequently their attempts at a song were really amusing. Their usual note is a deep cluck, similar to that of most Blackbirds, but of a rather deeper tone. In its movements upon the ground its gait is firm and graceful, and it may frequently be seen walking about over the grassy flats, in small companies, in a manner similar to the Cow Blackbird, which, in its movements, it greatly resembles. It nests in the sloughs, among the tulé, and the maximum number of its eggs is four.
Mr. W. J. McLaughlin of Centralia, Kansas, writes (American Naturalist, III, p. 493) that these birds arrive in that region about the first of May, and all disappear about the 10th of June. He does not think that any breed there. During their stay they make themselves very valuable to the farmers