Thursday, March 5, 2009

Amazing Flying Animals

Flying Snake:-
In the tropical rain forests of South and Southeast Asia, there lives 5 snake species that know how to travel in style. Unlike other snakes that crawl, climb, or swim, these snakes "fly'! This unusual choice of mode of transportation is how they got their name -- flying snakes. Of course, flying snakes' flying ability is an overstatement, because they don't have wings. Nevertheless, as flying snakes launch from one tree, undulate across the sky, and land onto another tree, they appear as if they are flying with a pair of invisible wings! So, how do flying snakes perform such a daredevil stunt? When a flying snake climbs to a desirable take-off spot, it first dangles from a tree branch high above the ground. Holding onto the branch with its tail, the flying snake hangs like a hook. Then, suddenly, the flying snake seems to lose its grasp and starts to fall. Well, as unbelievable as this looks, the freefall is not an accident. It is how the flying snake launches its "flight."
Flying Fish:-
Flyingfishes are easily recognised by their huge pectoral fins.
They are well known for their gliding (rather than flying) ability and can be loosely divided into two types.
The four-wing flyingfishes (like that in the images) have both the pectoral and pelvic fins enlarged.
The process of taking flight, or gliding, begins by gaining great velocity underwater, about 37 miles (60 kilometers) per hour. Angling upward, the four-winged flying fish breaks the surface and begins to taxi by rapidly beating its tail while it is still beneath the surface. It then takes to the air, sometimes reaching heights over 4 feet (1.2 meters) and gliding long distances, up to 655 feet (200 meters). Once it nears the surface again, it can flap its tail and taxi without fully returning to the water. Capable of continuing its flight in such a manner, flying fish have been recorded stretching out their flights with consecutive glides spanning distances up to 1,312 feet (400 meters).
They can glide for 200m or more. These fishes are often seen taxiing just above the water surface, rapidly beating the water with the large lower lobe of the caudal fin (see top image).
The two-wing flyingfishes have enlarged pectoral fins only. They generally do not glide as far at the four-wing flyingfishes. Flyingfishes use their gliding ability to escape from predators. A flying fish will commonly glide at double its swimming speed. Some species have been known to accelerate from a fast swimming speed of about 36km/hour to as much as 72km/hour in air.
Flying Frogs:-
Also known as parachute frogs, Wallace's flying frogs inhabit the dense tropical jungles of Malaysia and Borneo. They live almost exclusively in the trees, descending only to mate and lay eggs.When threatened or in search of prey, they will leap from a branch and splay their four webbed feet. The membranes between their toes and loose skin flaps on their sides catch the air as they fall, helping them to glide, sometimes 50 feet (15 meters) or more, to a neighboring tree branch or even all the way to the ground. They also have oversized toe pads to help them land softly and stick to tree trunks.Wallace's flying frogs are not the only frogs who have developed this ability, but they are among the largest. The black color of their foot webbing helps distinguish them from their similarly aerial cousins.They are generally bright green with yellow sides and grow to about 4 inches (10 centimeters). They survive mainly on insects.
Flying Squirrels:-
flying squirrel name for certain nocturnal tree squirrels adapted for gliding; they do not actually fly. Most are found in Asia, but one species of the genus Pteromys extends into SE Europe and the two species of Glaucomys are found in North America.
The gliding mechanism is a fold of furry skin extending along each side of the body from the wrist to the ankle and, in some species, to the tail. When the animal is at rest the flaps are folded; when it stretches its limbs for leaping, as do all tree squirrels, the flaps are stretched out taut like a parachute. The tail in many species is broad and flat, with a flat row of hairs on either side. The animal uses movements of the flaps, limbs, and tail to control direction.
The glide always starts from a high tree branch; if it is a long glide the animal comes to rest near the ground and must climb up again. The small North American flying squirrels leap from heights of 50 ft (15 m) or more and may travel a horizontal distance of over 100 ft (30 m). Flying squirrels are seldom seen because of their nocturnal habits and high dwelling places. They nest, often many together, in holes in trees.

No comments:

Post a Comment