1. passeriform bird perching birds mostly small and living near the ground with feet having 4 toes arranged to allow for gripping the perch; most are songbirds; hatchlings are helpless
  2. anseriform bird chiefly web-footed swimming birds
  3. piciform bird any of numerous nonpasserine insectivorous climbing birds usually having strong bills for boring wood
  4. coraciiform bird chiefly short-legged arboreal nonpasserine birds that nest in holes
  5. Passeriformes largest order of birds comprising about half the known species; rooks; finches; sparrows; tits; warblers; robins; wrens; swallows; etc.; the four suborders are Eurylaimi and Tyranni and Menurae and Oscines or Passeres
  6. apodiform bird nonpasserine bird having long wings and weak feet
  7. procellariiform seabird large long-winged bird with hooked bill and tubular nostrils that wanders the open seas
  8. cuculiform bird birds having zygodactyl feet (except for the touracos)
  9. pisiform bone a small wrist bone that articulates only with the triquetral
  10. columbiform bird a cosmopolitan order of land birds having small heads and short legs with four unwebbed toes
  11. performer an entertainer who performs a dramatic or musical work for an audience
  12. pelecaniform seabird large fish-eating seabird with four-toed webbed feet
  13. podicipitiform seabird aquatic birds related to the loons
  14. piriform area pear-shaped neural structure on either side of the brain in the rhinencephalon
  15. pyriform area pear-shaped neural structure on either side of the brain in the rhinencephalon
  16. platform bed a bed without springs
  17. caprimulgiform bird long-winged nonpasserine birds
  18. surfbird sandpiper-like shorebird of Pacific coasts of North America and South America
  19. pair formation the transformation of a gamma-ray photon into an electron and a positron when the photon passes close to an atomic nucleus
  20. gaviiform seabird seabirds of the order Gaviiformes

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