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In a system positing evolutionary relationships on the basis of structural affinities,
the tube- nosed birds seem to fit conveniently between the penguins and the
pelecaniform birds. But within the order, the arrangement of genera, species, and
Courtship calls are used during pairing and to a lesser degree during the
succeeding phases of breeding. There is marked vocal dimorphism between
sexes in the emperor penguin and the king penguin, and less marked
dimorphism in some ...
The eared seals (Otariidae) of the genera Arctocephalus and Neophoca also
take penguins in the Australian-New Zealand and subantarctic regions. FORM
AND FUNCTION The penguins are highly specialized for their flightless aquatic ...
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The New Encyclopaedia Britannica (Encyclopaedia)User Review - Not Available - Book Verdict
For virtually all its 238 years,Britannica has ruled the shelves as a peerless general encyclopedia. Reviewers have consistently given it high marks for most of the 12 criteria identified inKister's ... Read full review