The New Encyclopaedia Britannica: Macropaedia : Knowledge in depth |
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Page 95
... passerines , or perching birds , is the dominant avian group on Earth today . Considered the most highly evolved of all birds , passerines have un- dergone an explosive evolutionary radiation in relatively Worldwide recent geological ...
... passerines , or perching birds , is the dominant avian group on Earth today . Considered the most highly evolved of all birds , passerines have un- dergone an explosive evolutionary radiation in relatively Worldwide recent geological ...
Page 98
... passerines from all similar birds is their " perching " foot . In this foot type , all four toes are well developed and free from one another ; in some families ( wrens and most suboscines ) the front toes may be par- tially fused at ...
... passerines from all similar birds is their " perching " foot . In this foot type , all four toes are well developed and free from one another ; in some families ( wrens and most suboscines ) the front toes may be par- tially fused at ...
Page 100
... passerines they are entirely separate . This difference has been used by some to divide the passerines into two major groups : the Desmodactyli ( vinculum present ) and the Eleuthero- dactyli ( vinculum absent ) . EVOLUTION AND ...
... passerines they are entirely separate . This difference has been used by some to divide the passerines into two major groups : the Desmodactyli ( vinculum present ) and the Eleuthero- dactyli ( vinculum absent ) . EVOLUTION AND ...
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20th century adult Africa anemia Anseriformes antibodies antigens areas Asia behaviour bill birds blood group bodhisattva body Bolivia bone boxing Brazil Brazilian breeding broadcasting bryophytes Buddha Buddhist building called Caprimulgiformes centimetres central centre China clotting colonial colour countries cuckoos cultural developed disease display early eggs electrons Eocene falconiforms Family feathers feeding feet female flight forest fossil frequency genera genus gruiform hemoglobin important incubation Indian insects islands known legs Mahāyāna major male marrow metres molt monks nest normal North America owls pair Pāli parrots passerines patterns pelecaniforms penguins percent perch period Piciformes pigeons plasma platelets plumage political population produced programs protein radio red cells region river São Paulo sexes short signal South species sporangium structure Suborder tail television Theravada tion tissue toes tradition trees tropical tube usually Vajrayāna wings woodpeckers World young