The smallest bird in the world is the Bee Hummingbird or Zunzuncito (Mellisuga helenae). Is has 1.8 g (0.0039 lb) in weight, 5.4 cm (0.17 ft) in length and 7.5 cm (0.24 ft) in wingspan.
The biggest known ornithopod was Shantungosaurus (Shantungosaurus giganteus). It had 15 – 16.5 m (49.2 – 54.5 ft) in length and about 16 tons (35,274 lb) in weight.
