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Portland Bird Observatory Charity organisation When, for instance, waders fly in a single rush from North America to Australia without landing, one can observe the record-breaking values of bird flights. The evolution of the circulatory and other physiological systems, the genesis and maintenance of homo-thermia, and other general biological issues are also addressed in birds.th of a house sparrow is 16–18 cm, that of a crested crow is 31–35 cm, and that of a crow is 44–49 ...
[Animal Husbandry] - www.portlandbirdo*s.org.uk - UTF-8 - 2023-01-20

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