pleuropholid
great auk
ai
three-toed sloth
Bradypus tridactylus
mylodon
boreaspidid
extirpated
peradectid
mammaliamorph
genus Archaeornis
vombatomorph
imperiled
sparassocynid
phytosaurian
aspidorhynchiform
plesiadapiform
genus Protoavis
caprinid
palaeoryctid
archaeocete
anchithere
dodo
kioea
Raphus cucullatus
eosauropterygian
mahajangasuchid
aepyornis
palaeozoology
maradid
elephant bird
eptatretus
heath hen
pantolest
louisinid
clevosaurid
paleozoology
Tympanuchus cupido cupido
Pezophaps solitaria
dinornithiform
Belemnoidea
prophaethontid
solitaire
yalkaparidontid
order Belemnoidea
zoolite
eriptychiid