Other offerings had nothing to do with either human or avian flights.

A basal dromaeosaurid and size evolution preceding avian flight".

Water economy and energy expenditure in avian endurance flight.

Short- and long-term consequences of avian endurance flight.

Above the canopy, complex patterns traced by innumerable species of avian flight made me dizzy.

Archaeopteryx, being the oldest known ancestor of modern birds, could provide clues to the origin of avian flight.

Other research has shown that the physics involved in cursorial flight would not make this a likely answer to the origin of avian flight.

"Supporting online material for: A basal dromaeosaurid and size evolution preceding avian flight".

As a rule of thumb, a wing loading of 25 kg/m2 is considered the limit for avian flight.

There are many competing theories explaining the evolution of avian flight.