SIRS,--In connexion with Mr. J. Bartholomew's observation of a Blackbird reaching maturity with a deformed bill (Vol. X X L , p . 69), a somewhat similar case has come under m y notice this winter. In this case it is a n Alpine Chough (Pyrrhocorax graculus) whose upper mandible crosses t h e lower on t h e right side. This Chough is one oj several which come daily t o m y window here for food. I fi...
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