Resource Review: “Flight: The Genius of Birds”
by J.W. Wartick
“Flight: The Genius of Birds” is the latest from Illustra Media, “a non-profit 501 (c)(3) corporation specializing in the production of video documentaries that examine the scientific evidence for intelligent design.” In this film, the argument is made that the complexities of avian flight present a challenge to naturalistic scenarios in which such mechanisms may have arisen.
The Complexity of Birds
The film traces the incredible development of birds from single cells into babies and the way in which their bodies must work in order to achieve flight. One of the people interviewed in the film notes that flight is not an incremental phenomenon; the entire body must be set up in order to accomplish it. The way feet work, the shape of the wing, the structure of muscles, and the weight of bones are all factors which must come into play in order to make up an animal capable of flight.
“Flight” presents a number of different birds as case studies the complexity which the systems that make up a bird show. Hummingbirds’ flight muscles comprise, on average, 43% of the bird’s body mass. This allows the birds to have an enormous amount of precision in order to move in the ways that they can, such as hovering, moving backwards, laterally, etc. The hummingbird generates lift both on the back and the front strokes of their wings. This capability is grounded in the shoulder joints found in the bones which are at the bases of the wings. The hummingbird’s heart must beat at an enormous rate, which means that it also must eat quite a bit in order to sustain the energy level required for the bird’s metabolism and constant movement. The hummingbird’s tongue is particularly interesting, for it has a number of functions on it which allow it to draw up nectar far more efficiently than had been thought.
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These starlings, sometimes flying in groups in the hundreds of thousands, move in a stirring, beautiful way, seeming to shift as if they comprised one organism. The way that these birds continue flying without running into each other is by monitoring those starlings which are closest to each other. Rather than monitoring the entire formation, they simply move when those around them move, which lends itself to the movement of a flock as one kind of organism. Their movements must take place within very minuscule spans of time in order to maintain the formation. They follow air flows to minimize the turbulence they encounter, and their formation also serves as a defense mechanism.
Arctic terns have the longest migration of any animal on earth. They cross the planet from pole-to-pole to seek out nesting and feeding grounds. From the North Atlantic, they head south, eventually splitting as half go along the African coast while the other half goes along the coast of Brazil. In the south, near Antarctica, they feast upon small fish before heading back north. They must arrive back near Greenland and other areas in the north for a nesting period of about 8 weeks. Then, as winter sets in in the north, they head back south…