This is a brief presentation about the evolution of the ancient birds and how they started flying as an evolutionary perspective. Pictorial evidences are as follows.

1. Ancient Birds and
the Origin of Flight.
Ancient Birds
and
the Evolution of
Flight.
Made by
Nawal Saeed
Published by

2. Fossil of Archaeopteryx:
Location
 1861, Bavaria, Germany
Time Period
 150 million years ago
(Jurassic period)

3. Evidence for Bird:

5. Teeth in beadlike jaws and Reptilian Ancestry:

6. Origin of Flight:

8. 1st Hypothesis for the origin of flight:
 Clawed digits and clinging.
 Jumping.
 Gliding.
 Flapping.

10. 2nd Hypothesis for the origin of flight:
 Bipedal.
 Wings and batting.
 Teeth and claws.
 Wings and stability.

11. Sinornis - A 2nd Ancient Bird:
Location.
 China.
Time Period.
 135 million years old.

12. Characters of Modern Birds:
A shortened body and tail.
A sternum with large surface area.
Reduced claws.
Modified limbs.

14. Eoalulavis:
Location:
 Spain.
Time Period:
 115 million years ago.
Wing span:
 17cm.
Presence of Alula: