Birds evolved from ancient reptiles, as evidenced by transitions in their bone structure and growth of feathers on their forelimbs over time. A bird's wingspan and type of wings (such as elliptical or high-speed wings) influence its flight abilities and lifestyle. To measure a bird's wingspan, the distance is taken from wingtip to wingtip with the wings fully extended. In addition to providing lift, a bird's tail influences its maneuverability, agility and low-speed flight.

1. WELCOME TO OUR
PRESENTATION ON
BIRDS AND THEIR
WINGSPAN

2. EVOLUTION

3. Evolution Chart Of Birds
◦ Transitions started taking place drastically leading to weight of the bones getting
lighter and the forelimbs got shorter due to
◦ which the bone structure changed
◦ and slowly the forelimbs started growing feathers.
◦ The ancient reptiles then became birds

4. BIRDS

5. Lifestyle of Birds
◦Whether you want to ace this question at your next bird-themed trivia
challenge or just impress someone spontaneously, here's the answer: Birds
can live betweenfour and100years,depending on the species.

6. WINGS

7. Role of wings
◦ Wings. The shape of a bird's wing is importantfor producinglift.
◦ The increased speed over a curved, larger wing area creates a longer path of air. ...
◦ So smaller-winged birds (and planes) need to fly faster to maintain the same lift as those
with larger wings.

8. Types Of
wings
Passive soaring
active soaring
elliptical wings
high-speed wings.

9. WINGSPAN
◦ To find a bird's wingspan, you need to measurethe distancefrom the tip of one
outstretchedwing to the other. An eagle has a much larger wingspan than a sparrow.
Anything with two wings has a wingspan, which is one way to get a sense of its size.

10. TAIL

11. Influence Of Tail
Introduction. The tails of birds have important
aerodynamic functions: they produce lift,
supplementingthat created by the wings influence
flight manoeuvrability and agility and are particularly
useful at low flight speed

12. END
THANK YOU
HAVE A NICE DAY
BY Sweety kumari