Pine Crossbills by Desmond Nethersole-Thompson Pine Crossbills book. Read reviews from world’s largest community for readers. From mid-January to mid-April 1935 I was off on my dilapidated bicycle, b.. Pine Crossbills (Poyser Monographs) Desmond Nethersole About Pine Crossbills "From mid-January to mid-April 1935 I was off on my dilapidated bicycle, but how different Speyside was from Breckland. In late February many crossbills were still in flocks; I had to walk and cycle for many miles before finding my first nest in the last week of March, when I located a small breeding group in a plantation of old pines close to a keeper's cottage.
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