Well! I'll be a monkey's uncle! You sure said a mouthful there! But with all the hundreds of millions of years of evolutionary evidence and records of enviromental changes and predatory changes and all the history of all past changes if one wanted to could one SPECULATE on what that robin go after that worm will be 500,000 years from now? Is that enough time for him to speciate a couple of times? (my new word!)
No, that's my point. It's impossible to speculate without more information. To give an example, if the earth in a million years has giant pools of mercury rather than oceans of water, life, if any survives, would look different than it does now. It would be reasonable under this scenario, for example, to speculate that organisms that don't require water would be found. (What the physical form of these organisms would be is difficult to determine.) It would be reasonable to speculate that any organisms that would live in the mercury oceans would have body shapes that are more streamlined than fish and aquatic mammal are currently. Prediction is a tricky thing, however. We currently can't predict the weather with any degree of accuracy more than a day or two ahead of time. That doesn't mean we don't understand the mechanisms of weather, however. You could be expected to reasonably speculate about your great, great, great, great grandchildrens' hair color, but you would probably be wrong.
n.
The evolutionary formation of new biological species, usually by the division of a single species into two or more genetically distinct ones.
The question truly is, why can't we see this happening right now?
When Darwin discovered evolution, did evolution get upset and decide to stop in it's tracks?