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Much farther down, about two hundred yards from the bushes, a harrier hawk stood on the ground, tearing at something it had captured, feeding in that savage, suspicious manner usual with hawks, with long pauses between the bites. Over the harrier hovered a brown milvago hawk, a vulture-like bird in its habits, that lives by picking up unconsidered trifles.
Mill, J.S., on the origin of the moral sense; on the "greatest happiness principle;" on the difference of the mental powers in the sexes of man. Millipedes. Milne-Edwards, H., on the use of enlarged chelae of the male Gelasimus. Milvago leucurus, sexes and young of. Mimicry. Mimus polyglottus. Mind, difference of, in man and the highest animals; similarity of the, in different races.
They are the Milvago australis, a bird of which the sexes differ so much in appearance, that they were pointed out to me as distinct species.
For the Milvago, see 'Zoology of the Voyage of the "Beagle," Birds, 1841, p. 16. He is larger and more pugnacious than the female, and does not sit on the eggs. So that in all these respects this species comes under our first class of cases; but Mr.
After the cow-bird has left the nest it is still stupidly tame, and more than once I have seen one carried off from its elevated perch by a milvago hawk, when, if it had understood the warning cry of the foster parent, it would have dropped down into the bush or grass and escaped.
Some raptors never attack birds, others only occasionally; still others prey only on the young and feeble; and, speaking of La Plata district, where I have observed hawks, from the milvago chimango chiefly a carrion-eater to the destructive peregrine falcon, there is a very great variety of predatory habits, and all degrees of courage to be found; yet all these raptors are treated differently by species liable to be preyed on, and have just as much respect paid them as their strength and daring entitles them to, and no more, So much discrimination must seem almost incredible to those who are not very familiar with the manners of wild birds; I do not think it could exist if the fear shown resulted from instinct or inherited habit.
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