anything extinct qualifies...land, sea, air....whatev
im curious here because im hoping to find some other cool animals to read about....
i will start with a couple of my favorites...
first i have to go with
Gigantopithecus blacki
en.wikipedia.org...
Based on the fossil evidence, adult male Gigantopithecus blacki are believed to have stood about 3 m (9.8 ft) tall and weighed as much as 540 kg
(1,190 lb)
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you know they were some bad boys...wish i could go back in time and see one
Raphus cucullatus(dodo bird)
en.wikipedia.org...
Subfossil remains show the dodo was about 1 metre (3.3 feet) tall and may have weighed 10–18 kg (22–40 lb) in the wild.
It has been depicted with brownish-grey plumage, yellow feet, a tuft of tail feathers, a grey, naked head, and a black, yellow, and green beak.
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Velociraptor
en.wikipedia.org...
Velociraptor was a mid-sized dromaeosaurid, with adults measuring up to 2.07 m (6.8 ft) long, 0.5 m (1.6 ft) high at the hip, and weighing up to 15 kg
(33 lb).[4] The skull, which grew up to 25 cm (9.8 in) long, was uniquely up-curved, concave on the upper surface and convex on the lower. The jaws
were lined with 26–28 widely spaced teeth on each side, each more strongly serrated on the back edge than the front
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i have lots more but thats off the top of my head.....