Where both forms are common this constantly happens—indeed, so constantly that Professor Newton, in his new edition of 'Yarrell,' has made but one species of the Black Crow and the Grey or Hooded Crow, Corvus corone and Corvus cornix, on the several grounds that there is no structural difference between the two; that their habits, food, cries, and mode of nidification are the same (in considering this, of course both forms must be traced throughout the whole of their geographical range, and not merely through the British Islands); that their geographical distribution is sufficiently similar not to present any difficulty; that they breed freely together; and that their offsprings are fertile, a very important consideration in judging whether two forms should be separated or joined as one species. This last seems to me to present the greatest difficulty, and the evidence at present appears scarcely conclusive. Of course in the limits of a note to a work like the present it is impossible to discuss so large a question. I can only refer my readers to Professor Newton's work, where they will find nearly all that can be said on the subject, and the reasons which have induced him to come to the conclusion he has.
Rim. Gu., p. 35.
Query, was this done by a migratory flock, as peas would be ripe about June or July, when migratory flocks of Wood Pigeons would not be likely to occur; or was the damage to newly sown peas in the spring?
For one instance see notice of the Quail; and the bird-stuffer had several other eggs besides those in the same nest as the Quails.