They would follow the dibbling machine, taking each grain of seed-wheat in succession, guided to the exact spot by the slight depression made by the dibble.
Every evening all the rooks of the neighbourhood gathered into vast flocks and returned to roost in the woods of the Chace.

But one winter afternoon there came on the most dense fog that had been known for a length of time, and a flock of rooks on their way as usual to the Chace stopped all night in a clump of trees on the farm a mile from the roosting-place.

This the oldest labourer had never known them do before.

In the winter just past (1879-80) there were several very thick fogs during sharp frost.

One afternoon I noticed a small flock of starlings which seemed unable to find their way home to the copse where I knew vast numbers of them roosted.