curious dance custom. No man need look for them. They will look for
him, and when they find him they will fairly yell the discovery to the
universe. In the marshes of the lower Parana I saw flocks of scarlet-
headed blackbirds on the tops of the reeds; the females are as
strikingly colored as the males, and their jet-black bodies and
brilliant red heads make it impossible for them to escape observation
among their natural surroundings. On the plains to the west I saw
flocks of the beautiful rose-breasted starlings; unlike the red-headed
blackbirds, which seemed fairly to court attention, these starlings
sought to escape observation by crouching on the ground so that their
red breasts were hidden. There were yellow-shouldered blackbirds in
wet places, and cow-buntings abounded.

But the most conspicuous birds I saw were members of the family of
tyrant flycatchers, of which our own king-bird is the most familiar
example. This family is very numerously represented in Argentina, both
in species and individuals. Some of the species are so striking, both
in color and habits, and in one case also in shape, as to attract the
attention of even the unobservant. The least conspicuous, and
nevertheless very conspicuous, among those that I saw was the
bientevido, which is brown above, yellow beneath, with a boldly marked
black and white head, and a yellow crest. It is very noisy, is common
in the neighborhood of houses, and builds a big domed nest. It is
really a big, heavy kingbird, fiercer and more powerful than any
northern kingbird. I saw them assail not only the big but the small
hawks with fearlessness, driving them in headlong flight. They not
only capture insects, but pounce on mice, small frogs, lizards, and
little snakes, rob birds' nests of the fledgling young, and catch
tadpoles and even small fish.