Struthioniformes
order Struthioniformes
order Rheiformes
Rheiformes
order Dinornithiformes
Dinornithiformes
genus Protoavis
order Casuariiformes
Casuariiformes
genus Archaeornis
archeopteryx
Archaeopteryx lithographica
archaeopteryx
genus Ibero-mesornis
paleornithology
protoavis
genus Archeopteryx
genus Archaeopteryx
starling
struthionine
palaeornithology
Struthionidae
Archaeornithes
family Struthionidae
subclass Archaeornithes
ornithology
Paleocene epoch
Paleocene
order Apterygiformes
Apterygiformes
Ornithischia
order Ornithischia
Gaviiformes
order Gaviiformes
Ratitae
superorder Ratitae
Casuaridae
family Casuaridae
Raptores
class Aves
Falconidae
order Ictodosauria
order Psittaciformes
order Raptores
family Titanosauridae
family Falconidae
Aves
struthious
Psittaciformes
velociraptor
Ictodosauria
Titanosauridae
pantodontan
hesperornithiform
diatryma
family Uintatheriidae
family Phaethontidae
choristodere
ornithichnite
genus Gyps
gallina
Phaethontidae
ornithomimosaurian
genus Cygnus
Uintatheriidae
fourchette
Cygnus
Gyps
jungle fowl
avisaurid
Sauropterygia
order Sauropterygia
reedling
bird genus
avialan
avialian
Himalayan griffon vulture
Sinornis
family Turnicidae
Phasianidae
genus Antrodemus
pantodont
order Ichthyosauria
cathartid
typotherian
Turnicidae
genus Allosaurus
genus Cepphus
family Phasianidae
Ichthyosauria
archaeoentomological
tickleass
Cepphus
New World vulture
acanthostegid
psittacine
genus Dromaius
Dromaius