[shunyadragon]

There are other factors which greatly influence speciation once you have diversity an ability to adapt to new environments.

The first factor is apparently there are times when the environment is very favorable and presures of selection are weak. This allows for large populations with great diversity.

The next is opportunities to move into other environments with different conditions and food supplies. This where subspecies can be seen commonly developing today in many situations like grasses and birds.

Time and isolation are next. The subspiecies adapt to new foods and environments over time and change further and become distinct species.