Birds
Birds are some of the most amazing animals on earth. Most have the ability to fly. Some use ground travel. Some use claws, others use only their beaks. Birds come in many varieties of colors and sizes.
Birds are warm-blooded, egg-laying creatures from the aves class. Along with the obvious feathers and wings, birds have other adaptations for flying such as a wide keel on the sternum, with large wing muscles attached, air spaces and sacs throughout the body and bones, to decrease their weight, and they have various bone fusions and reductions to strengthen and streamline their body.
There are more than 8700 species of birds. Their habitats range from icy shores of Antarctica to the hottest parts of the tropics and from mountains, deserts, plains, and facts to open oceans and deeply urbanized areas.
The sizes of birds range from the tiny bee hummingbird, which has a total length of two and a half inches, to the albatross, which has a wing span of eleven and a half feet. The largest bird is a bird that cannot fly, the ostrich. Ostriches can stand almost eight feet high and can weigh near 350 pounds. Other extinct birds have been measured to stand over ten feet high.
The evolution of birds is still being argued. Most people believe that birds evolved from reptiles. Because of birds mainly delicate bones, few fossils have be...
There are at least 145 living species of the suborder Anthropoidea . Over 90% of them are monkeys. The remaining species are apes and humans. The anthropoids (members of the suborder Anthropoidea) have been the most successful primates in populating the earth. They are generally larger, more intelligent, and have more highly developed eyes than the prosimians.
In 1782, the bald eagle was elected as the national symbol of the United States of America, yet by the early 1960’s, it was nearly extinct in the Continental United States. A combination of many dangers, with the main danger being the pesticide DDT, the bald eagle was on the verge of extinction. Yet, through conservation measure applied by the United States government the bald eagle cam back from the brink and was taken off of the endangered species list in 2007.
form of a bird usually a falcon and fly around in the world of the living
Dudley, Robert. "The Evolutionary Physiology of Animal Flight: Paleobiological and Present Perspectives". Annual Review of Physiology. 2000. 63:135-55. 27 Aug 2007 http://arjournals.annualreviews.org
Jazz Stephens presented on Does Incubation Behavior Influence Nestling Telomere Length? And Egg Gross-Foster Experiment In Barn Swallows. The research measured effects of telomere length of barn swallow based on specific environmental criteria. In barn swallows, it is known that telomere length is associated with survival, reproductive growth, and success. The research team analyzed how incubated temperature affects telomere length. This experiment was done by two methodologies. The first, cross-foster design, which decoupled genetic environments to analyze how telomere changes in different environments. To test the temperature within the nest, a fake egg was placed within the nest the recorded the continuous temperature within the nest.
which has the upper body of a woman and the lower body of a winged
A chicken wing does in fact, compare to a human arm in a variety of ways. To begin, a major similarity between the human arm and the chicken wing, is the bone structure. From the research we did in our dissection, and the image on google classroom, the humerus, the radius, and the ulna are the three bones that form the major bone structure of the chicken wing, and the human arm. Furthermore, two specific muscles in the human arm and the chicken wing are shared. The research from our dissection notes helped us notice that these two muscles are the flexor, and the extensor, the flexor is the muscle that makes your arm flex, by pulling in, and the extensor is the muscle that makes your arm stretch out to the full length. Finally, the nerves are
Several models have been proposed to explain why might Archaeopteryx or its decedents develop the ability to fly. The “pouncing proavis” or “trees-down” model was proposed by J.P. Garner and colleagues in 1999. They theorize that birds evolved to the ability to fly by first living in trees and then gliding down to ambush prey. Natural selection favoured individuals that could glide the furthest to catch prey and eventually led to the origin of flight. Garner and colleagues (1999) believed that this theory explained three aspects of early flight: the model matches observed secession in flight evolution based on fossil records, it predicts a primitive bird-like animal had few adaptions to flapping but very complex aerodynamic feathers, and it explains the origin of rachis in feathers.
The musical “Cats” is an outstanding show that captivates audiences of all ages. It is based on a book of poems called, “Old Possum’s Book Of Practical Cats”, written by T.S. Eliot. “Cats” tells a nonsense story of different cats. The amazing music, unique costumes, and intricate dance choreography bring a breath-taking story to life that a leaves a lasting impression on the viewer.
American Crows have a number of features that make them identifiable, and to help keep them from being confused with another member of the Corvus genus, the Common Raven (Marzluff et al., 2013). American Crows can reach a length between 17 to 21 inches, with a wingspan of 39 inches, while the Common Raven is a larger bird that has an average length of 24 inches (Burton et al. 2010; Marzluff et al, 2013). Both the American Crow and the Common Raven have black coloration, but their feathers and beaks differ. Common Ravens have a larger, stronger beak, a wedge-shaped tale, and spikey feathers on their throat. American Crows, on the other hand, have a smaller and less bulky bill, smooth throat feathers, and they have tail feathers that fan out instead of forming a wedge (Marzluff et al, 2013). The two birds have different styles of flying. A Common Raven soars in flight, but C. brachyrhynchos usually keeps flapping its wings instead of gliding (Burton et al. 2010; Marzluff et al, 2013). Finally, American Crows also have a different call than their raven counterparts: their cry is a “caw, caw” that sets its voice apart from the croaking noises ravens make (Marzluff et al, 2013...
boat is very similar to the wing of an airplane or even a bird's wing. The
The idea of winglets was developed by F.W. Lancaster a British aerodynamicist in the late 1800s. However, it was not until an energy crisis in 1976, causing the price of fuel to skyrocket, that Richard Whitcomb, a NASA aerodynamicist, took Lancaster’s concept to the next step. Whitcomb soon published a comparison between a wing with a winglet and the same wing with a simple wing extension to increase its span. This paper showed significant improvement from the simple wing extension to the wing with the winglet. The winglet caused a reduction in drag and an improvement in the lift/drag ratio. Whitcomb proved that in theory the winglet would work, but it was Burt Rutan, an American aerospace engineer that went ahead and designed his ‘Vari-Eze’ to incorporate the ‘Whitcomb Wings’. “Rutan takes winglets from the drawi...
larger and heavier than the males. An average female (called a falcon) weighs a little over