The Purple Martin (Progne subis) is generally recognised as being the largest North American swallow. Its body measures about 20 cm in length and it has a wingspan of 39-41 cm. The Purple Martin is an incredibly acrobatic flyer. Today they are commonly found nesting in backyard birdhouses. The Purple Martin has been making use […]
Scientists theorize that birds evolved from dinosaurs. This theory for the evolution of birds was brought about by the discovery of a fossil species possessing feathers. This fossil species called Archaeopteryx lithographica dates back to 150 million years ago and is thought to have evolved from dinosaurs called theropods. Archaeopteryx lithographica had two strong legs […]
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