Biology: Big Animals

The largest known animal ever is the blue whale.

Others:

Rhamphosuchus: Estimated length of 15 to 18 m. It is only known from incomplete sets of fossils, mostly teeth and skulls, but palaeontologists estimate that it was one of the largest, if not the largest crocodylian that ever lived. (extinct)

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Saltwater Crocodile

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Saltwater Crocodile: Record Length: 20.6 ft (6.3 m) Typical Length: 4.5 to 5 m (14.8 to 16.5 ft) The largest living reptile.

Eastern Lowland Gorilla: 225 kg (500 lb) and 1.83 m (6 ft). The largest living primate.

Songhua River Mammoth Largest mammoth ever


Ostrich: height: over 2.7 m (9 ft). weight: over 156 kg (345 lb). The largest living bird.

These fact are not in any order.

Sources:
Wikipdia