Letters

01 June 1958 Comments Letters S I R S , -- U n d e r the above title (anlea, vol. L, p p . 432-434), R. Hewson has usefully drawn attention to the aerobatics-- familiar in individuals--that are sometimes performed by flocks of Ravens (Corvus corax) and has discussed questions suggeste...
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Letters

01 February 1957 Comments Letters ICELAND R E D W I N G S WINTERING SIRS,--October 1956 saw an unparalleled " i n v a s i o n " of Iceland Redwings (Turdus musicus coburni) through Fair Isle, big movements occurring on the i2th, i8th-2oth and 2zLth-25th with westerly weather. Of 333 Redwi...
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