The existence of reproductive isolation, so that these situations can not occur, even if there are some individuals of different species sometimes complete the mating, but they generally can not produce offspring, or produce offspring can not continue to reproduce
The Titan Python is actually not a snake under the family Pythonidae, but a snake under the family Anaconidae, which belongs to the genus Titan Python. Titan pythons lived about 60-58 million years ago.
It is proposed that birds originated from dinosaurs, and that "ancestor birds" are a transitional species between birds and dinosaurs.
