THE Rook (Corvus f. frugilegus) is an essential part of the English country-side. Its large size, its characteristic cawings and its habit of appearing in flocks all the year round compel attention. Although an arboreal species, so far as nesting is concerned, it is essentially a bird of agricultural land. When feeding, it almost invariably frequents farm lands at all times of the year, and, as it...
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