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Rh, and which is a very striking sound. Starlings are mingled with these latter birds, flying amongst them, yet in their own bands, and alighting with them on the meadow, where they continue to form an imperium in imperio. Both they and the rooks descend at one point, in a black or brown patch, but soon spread out over the whole meadow, from which they often rise up in a cloud, and, after flying about over it for a little, come down upon it again. At last a vast flock of starlings—numbering, I should think, many thousands—flies up, and, being joined by all those that were on the field, the whole descend upon the woods, through which they disseminate themselves. Almost immediately afterwards, the rooks, as though taking the starlings for their guide, rise too, and fly all together to the woods. Now comes a troop of some eighty rooks, and, shortly afterwards, another much larger one—two or three hundred at the least—all flying high, and going steadily onwards in one uniform direction. They are all uttering a note which is difficult to describe, and does not at all resemble the ordinary 'caw.' It has more the character of a chirrup, loud in proportion to the size of the bird, but still a chirrup—or chirruppy. There is great flexibility in the sound, which has a curious rise at the end. It seems to express satisfaction and enjoyable social feeling, and, if so, is very expressive. One feels, indeed, that every note uttered by rooks is expressive, and if one does not always quite know what it expresses that is one's own fault, or, at any rate, not theirs.

"Twenty more now pass, then twenty-seven, and, finally, another large body of some two to three hundred—all flying in the same direction. It is the last