animalia
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  • BIRDS
    • Ratites >
      • Rhea
      • Ostrich
      • Emu
      • Southern Cassowary
    • Anserifomes >
      • Crested Screamer
    • Anatidae-Ducks, Geese, Swans s and Screamers >
      • Rosy bill Pochard
      • Orinoco Goose
      • Crested Screamer
      • White winged Duck
      • Mandarin Duck
      • Ruddy Duck
    • Spheniscidae- penguins >
      • African Penguin
      • Little Penguin
      • Magellanic penguins
    • Gruiformes >
      • Sunbittern
      • Bustards >
        • Kori Bustard
        • White-bellied Bustard
      • Gruidae- Cranes >
        • Wattled Crane
        • Saurus Crane
        • Black Crowned Crane
        • Whooping Crane
        • Grey Crowned Crane
        • Red Crowned Crane
        • Sandhill Crane
        • white-naped Crane
        • Blue Crane
        • Demoiselle Crane
    • Pelicaniformes-Pelicans, Gannets, Cormarants, Shags and Frigatebirds >
      • Pelecanidae >
        • Brown Pelican
        • Great White Pelican
        • American White Pelican
    • CICONIIFORMES: Storks, Herons, Ibises and Shoebills >
      • Red-legged Seriema
      • Ardeidae >
        • Pinked Backed Pelican
        • Boat-billed Heron
        • Goliath Heron
      • shoebill
      • Hamerkop
      • Threskiornithidae >
        • African Spoonbill
        • Roseate Spoonbill
        • Scarlet Ibis
      • CICONIIDAE >
        • Abdim's Stork
        • Jabiru
        • Marabou
        • Saddle-bill Stork
        • Storm's Stork
        • Wood Stork
        • Yellow-billed Stork
    • Rampshastidae-toucans, aracaris, toucanets >
      • Keel-billed Toucan
      • Swainson's Toucan
      • Toco Toucan
    • RAPTOR >
      • ACCIPITRIDAE >
        • Stellar's Sea eagle
        • Bald Eagle
        • Palmnut vulture
        • Lappet-faced Vulture
        • Harpy Eagle
        • African Crowned Eagle
        • Red-shouldered Hawk
        • Short-tailed Hawk
        • Red-tailed Hawk
      • CATHARTIDAE-new world vultures >
        • Andean condor
        • Black vulture
        • King vulture
        • Turkey Vulture
    • Coraciiformes >
      • Halcyonidae >
        • Laughing Kookabura
        • white-collared Kingfisher
      • Coracidae >
        • Blue-bellied Roller
        • Racket-tailed Roller
      • Bucerotidae >
        • Abyssinian Ground Hornbill
        • Eastern Yellow-billed Hornbill
        • Rhinoceros Hornbill
        • Wreathed Hornbill
        • Wrinkled Honbill
    • Psittaciformes >
      • Cacatuida >
        • Palm Cockatoo
        • Moluccan Cockatoo
        • Umbrella Cockatoo
      • Psittacidae >
        • Rainbow lorikeet
        • Blue-streaked Lory
        • Yellow-streaked Lory
        • Pasquets Parrot
        • Hyacinth Macaw
        • Green-winged Macaw
        • Scarlet Macaw
    • Passeriformes >
      • White headed Buffalo Weaver
      • White-crowned Robin Chat
      • Bali Mynah
      • Golden-breasted Starling
      • lesser Bird of Paradise
  • MAMMALS
    • Carnivora-Bears, cats, dogs, raccoons. otters >
      • Felidae-CATS >
        • Bobcat
        • Ocelot
        • Jaguar
        • Leopard
        • Lion
        • Snow Leopard
        • Tiger
        • Mountain Lion
        • cheetah
      • Mustelidae >
        • Oriental Small-clawed Otter
        • giant river otter
        • North American River Otter
    • PRIMATE >
      • Hylobatidae >
        • Northern White-cheeked Gibbon
        • Siamang
      • HOMINIDAE- Apes >
        • Bonobo
        • Western Gorilla
        • Orangutan
        • Chimpanzee
      • Callitricidae >
        • Cotton-top Tamari
        • Red-handed Tamarin
        • Golden Lion Tamarin
        • Golden-headed Lion Tamarin
        • Black Lion Tamarin
        • Emperor Tamarin
        • Pied Tamarin
        • Pygmy Marmoset
      • Atelidae- Spider, Wooly and Howler Monkeys >
        • Red howler monkey
        • southern Black Howler Monkey
        • Central American Spider Monkey
    • Pilosa-anteaters, sloths, >
      • Giant Anteater
      • Brown Throated Three toed sloth
      • Hoffman's Two-toed Sloth
    • Marine Mammals >
      • Manatee
      • Cetacea >
        • Beluga
    • ARTIODACTYLA- >
      • Bovidae >
        • Dama Gazelle
        • Gemsbok
        • Scimitar-horned Oryx
        • Lesser Kudu
        • Greater Kudu
        • Klipspringer
        • Bongo
        • Bontebok
        • Waterbuck
        • addax
        • Nubian Ibex
      • Suidae >
        • Red River Hog
        • Warthog
      • Giraffidae >
        • Giraffe
        • Okapi
    • Elephantidae >
      • African Elephant
      • Asian Elephant
  • REPTILES
    • Crocodylia-Alligators, Crocodiles and Gharials >
      • American Alligator
      • Chinese Alligator
      • Gharial
      • Morelet's Crocodile
      • Orinoco Crocodile
      • Saltwater Crocodile
      • Cuban Crocodile
      • Nile Crocodile
      • Mugger Crocodile
    • SQUAMATA >
      • Serpentes >
        • Green Anaconda
        • Copperhead
      • VARANOIDEA- Varanids and Helodermids >
        • Komodo Dragon
        • Green Tree Monitor
        • Water Monitor
        • Gila Monster
        • Beaded Lizard
  • AMPHIBIANS
    • Anurans-Frogs and Toads
  • Index
  • Reference
  • New Page
Pelicaniformes is an order of water birds found throughout the world. There are over 65 species divided among  six families. The characteristics of the order include a bill pouch, webbed feet and advanced air  sacs. Pelicaniformes are the only birds that have weeping between all four toes. The most recognizable feature for the order is the pouch in the bill known as a gular sac. Although most extreme in the pelicans it is also present in the other members.

The classification of the order has recently been under review.genetic evidence places the six species of true pelicans in an  order with the Hamerkopf and Shoebill. The other families are grouped together in the order Suliformes. It is believed that the common characteristics are a result of convergent evolution and not a common ancestor. Both the American Ornithological  Union and the  International Ornithological Union have adopted this classification, however, both the IUCN and IISIS continue to use the older classification.
Picture
RCP
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