Originally Posted by leewong[You must be logged in to view images. Log in or Register.]
Every species is transitional. Dogs are wolves with distinct traits they acquired through evolution (change over time). Just as wolves are canids with distinct traits they acquired through evolution. Just as canids are mammals with distinct traits they acquired through evolution. Evolution doesnt claim one day a cow gave birth to a chicken then all cows died off because the chicken was superior but that is exactly what you believe it seems.
Hybrids are when two distinct species are mixed to produce an offspring. That isnt evolution in even the broadest sense. Hybrids can only be made when the two species are closely related in evolutionary terms and the results are exactly what you would expect to see. Two isolated populations of animals use to be the same animal but through years and years of evolution they have changed. They have changed so much from one another they cannot produce non-sterile offspring.