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Bennett, Dr., on birds of paradise. Berbers, fertility of crosses with other races. Bernicla antarctica, colours of. Bernicle gander pairing with a Canada goose. Bert, M., crustaceans distinguish colours. Bettoni, E., on local differences in the nests of Italian birds. Beyle, M., see Bombet. Bhoteas, colour of the beard in. Bhringa, disc-formed tail-feathers of.
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