The foregoing is what my landlord told me one morning at Buena Vista. Nor did I waste time in finding the way to the lake, a small sheet of water, as clear as crystal, embowered in the lovely park lying between towering, snow-clad mountains. One might almost call the spot a bird's Arcadia. In no place, in all my tramping among the Rockies, did I find so many birds in an equal area. In the green, irrigated meadow bordering one side of the sheet of water, I was pleased to find a number of Brewer's blackbirds busily gathering food in the wet grass for their young. And who or what are Brewer's blackbirds? In the East, the purple and bronzed grackles, or crow blackbirds, are found in great abundance; but in Colorado these birds are replaced by Brewer's blackbirds, which closely resemble their eastern kinsfolk, although not quite so large. The iridescence of the plumage is somewhat different in the two species, but in both the golden eye-balls show white at a distance. When I first saw a couple of Brewer's blackbirds stalking featly about on a lawn at Manitou, digging worms and grubs out of the sod, I simply put them down in my note-book as bronzed or purple grackles--an error that had to be corrected afterwards, on more careful examination. The mistake shows how close is the resemblance between the two species. The Brewer division of the family breed on the plains and in the mountains, to an altitude of ten thousand feet, always selecting marshy places for their early summer home; then in August and September, the breeding season over, large flocks of old and young ascend to the regions above the timber-line, about thirteen thousand feet above sea-level, where they swarm over the grassy but treeless mountain sides in search of food. In October they retire to the plains, in advance of the austere weather of the great altitudes, and soon the majority of them hie to a blander climate than Colorado affords in winter. Still more interesting to me was the large colony of yellow-headed blackbirds that had taken up their residence in the rushes and flags of the upper end of the lake. These birds are not such exclusive westerners as their ebon-hued cousins just described; for I found them breeding at Lake Minnetonka, near Minneapolis, Minnesota, a few years ago, and they sometimes straggle, I believe, as far east as Ohio. A most beautiful bird is this member of the _Icteridæ_ family, a kind of Beau Brummel among his fellows, with his glossy black coat and rich yellow--and even orange, in highest feather--mantle covering the whole head, neck, and breast, and a large white, decorative spot on the wings, showing plainly in flight. He is the handsomest blackbird with which I am acquainted.