“I WAS SPYING FOR SOME TIME.”
From a Photograph by the Author.
XI
THE METHOD BY WHICH EAGLES AND
HAWKS SECURE THEIR PREY
As is well known, the eagle lives largely on carrion such as dead deer and carcases of sheep, differing in this respect from the peregrine falcon, which lives exclusively on what it kills. Generally speaking, the eagle secures its prey by pouncing on it on the ground and carrying it away in its talons. He swoops down at a great pace in a slanting direction, and in this way not only captures hares and rabbits, but also grouse and ptarmigan on the ground and young ducks on the loch. It is very interesting to watch the great bird searching slowly along the side of a hill, about 50, 100, or 150 yards above the ground; then he suddenly pounces, and in a moment is up again and away with his prey in his talons. So regularly does the eagle adopt this method of capturing his prey on the ground, that I have met stalkers who have told me that they do not believe that an eagle can overtake any swift-winged bird such as grouse or black game. This is certainly wrong, for the eagle does sometimes, though comparatively rarely, adopt the other method of securing his prey—the method which I have already described (see p. 64, supra)—that of pursuing and catching his prey in the air, and in this way without doubt captures blackcock, grouse, and ptarmigan. I have already stated (see pp. 57-70, supra) that in my opinion the eagle in his downward flight is faster than the peregrine. Even in his horizontal flight, once he gets going he can fly very fast if he chooses, but of course is not nearly so agile and cannot turn and twist with the rapidity of the peregrine, and the result is that when he overtakes his quarry he frequently misses him.
Nearly a hundred years ago one of the most acute observers amongst ornithologists wrote as follows: “In another part of the Western Highlands of Scotland we had an opportunity of witnessing the powers of flight of this bird in pursuit of its quarry. An old blackcock was sprung and was instantly pursued by the eagle (who must have been on a neighbouring rock unperceived) across the glen, the breadth of which was at least 2 miles.
“The eagle made several unsuccessful pounces, but as there was no cover and the bird large, it probably fell a victim in the end.”[28]
Lastly, as I have already said in the pages just mentioned where I have fully discussed the matter, the eagle on rare occasions swoops down at a terrific pace on his prey in the air, striking it to the ground but not clutching it or, to use the falconer’s phrase, binding on it.