CHAP. 36. (25.)—BIRDS WHICH REMAIN WITH US THROUGHOUT THE YEAR; BIRDS WHICH REMAIN WITH US ONLY SIX OR THREE MONTHS; WITWALLS AND HOOPOES.
The time during which birds show themselves differs very considerably. Some remain with us all the year round, the pigeon, for instance; some for six months, such as the swallow; and some, again, for three months only, as the thrush, the turtle-dove, and those which take their departure the moment they have reared their young, the witwall[2989] and the hoopoe, for instance.