penguin

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Related to Sphenisciformes: Spheniscidae

penguin

completely marine, aquatic flightless bird inhabiting only the southern hemisphere. There are six genera, all of them gregarious, monogamous and piscivorous, including Aptenodytes and Megadyptes in the order Sphenisciformes. Varieties include black-footed, pigeon-toed.
References in periodicals archive ?
The phylogeny of the Sphenisciformes reveals that important radiations of small and large Weddellian penguins took place during the Late Paleocene/Early Eocene in Antarctica.
Investigations of the phylogenetic relationships within the orders Procellariiformes and Sphenisciformes have been characterized by a lack of agreement among authors.
The data include species from the orders Sphenisciformes, Procellariiformes, Pelecaniformes, Falconiformes, Charadriiformes, Strigiformes, Apodiformes, Coraciiformes, and Passeriformes.
Lymphoma has been described in birds in the orders Anseriformes, Charadriiformes, Columbiformes, Ciconiiformes, Galliformes, Passeriformes, Psittaciformes, Strigiformes, Sphenisciformes, Pelecaniformes, and Struthioniformes.