Pterosaur size

Species among pterosaurs occupied several types of environments, which ranged from aquatic to forested.

Anurognathus is another small pterosaur, with a wingspan of 35 cm (14 in) and 40 g (1.4 oz) in body mass,[2] along with an indeterminate non-pterodactyloid pterosaur from the Portland Formation, although it is indeterminate and known from very fragmentary remains, only including a tooth, and part of the wrist bones.

For comparison, the wandering albatross has the largest wingspan of living birds at up to 3.5 m (11 ft) but usually weighs less than 12 kilograms (26 lb).

Factors such as the warmer climate of the Mesozoic or higher levels of atmospheric oxygen have been proposed but it is now generally agreed that even the largest pterosaurs could have flown in today's skies.

[21] Partly, this is due to the presence of air sacs in their wing membranes,[22] and that pterosaurs launched into flight using their front limbs in a quadrupedal stance similar to that of modern bats, a method faster and less energy taxing than the bipedal launching of modern birds.