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The order Pelecaniformes comprises a number of diverse groups of aquatic birds
that share the common characteristic of webbing between all four toes. There are
three main groups (suborders): Phaethontes, the tropic birds; Fre- gatae, the ...
9-13 percent of the adult weight, in the frigate birds, 6 percent, in the boobies, 3-5
percent, and in the pelicans and cormorants, 2-3 percent. In species with clutches
of more than one, eggs are laid at intervals as short as 24 hours, or as long as ...
The bird order Piciformes includes the familiar woodpeckers, their relatives the
piculets and wrynecks (collectively, the family Picidae), and the exotic tropical
jacamars (Galbulidae), puff birds. (Bucconidae), barbels (Capitonidae), honey ...
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review
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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