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Nuthatch, of Japan, intelligence of; Indian. Obedience, value of. Observation, powers of, possessed by birds. Occupations, sometimes a cause of diminished stature; effect of, upon the proportions of the body. Ocelli, absence of, in female Mutilidae. Ocelli of birds, formation and variability of the. Ocelot, sexual differences in the colouring of the. Ocyhaps lophotes. Odonata.
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