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Rekna:
For a good example of "missing links" look at the evolution of Cetaeans ( Whales, Dolphins, and Porposes. ) You can see the movement of the nostril from the front of the skull to the top, for example, as several intermediate species exist in which the "proto-blowhole" is halfway up the bridge of the nose, moving toward its' current position on the crown of the skull. You can also see the gradual vestigiation of the hind limbs and elongation of the forelimbs in Whales as their ancestors became totally Marine ( whales were originally an otter-like terrestrial mammal ). National Geographic did a very good article on this awhile back.
Another good example of evolution-in-action is the Influenza and AIDS viruses. AIDS can actually be seen evolving inside the body of its' host: drug-resistant strains evolve, survive, and reproduce within the body until the patient no longer responds to drugs. If the medication is withdrawn for a few months, the drug-resistant strains are supplanted by HIV-1 or other non-resistant strains. Flu is much the same; it keeps changing every year or so because it is evolving to be resistant to antibiotics. Tuberculosis, Polio, and Malaria are all doing the same thing.
A further intermediate species are the several species of dinosaurs which we now know to have been covered in feathers.
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