Note 51 — Front matter (continued 9)

I have been beset in this manner by a Lesser Tern, so far on in the summer that I could not attribute its actions to any anxiety about either eggs or young. I am inclined to think it is, on such occasions, taught by its instinct to accompany a traveller for the sake of the insects disturbed by his movements. During the summer months, the shingle, on a sunny beach, is haunted by myriads of sluggish flies, which rarely take wing unless thus disturbed. That the Chimney Swallow often accompanies the traveller for this object, I have no doubt; as I have seen them fly to and fro before me, darting in among the swarming flies, and so intent in their chase, as to pass within a few yards of my feet every time they crossed my path.