G'day Travis and Les,
Glad you liked it.
Travis,
It doesn't really matter how long the animals last, in nature life is nasty, brutish and short anyway. It is important that they are living long enough to breed and are healthy enough to produce viable offspring. What is of most interest is how nature returns to fill a void, in even the most disturbed of ecosystems.
Just free nature from the influence of humans and the wild returns. Something to think about on your next walk

Cheers.