Evolution, by definition, takes millenia. It generally doesn't occur in such a short time frame as the 150 years since photography began to be used. The only time that a substantial change in a species would occur in such a short time span would be in the event of a massive disaster like a volcanic explosion destroying all available fauna, or the Everglades deer mentioned earlier.
However, if you want "proof" that evolution takes place, it would be simple to set up an experiment with a fast breeding species like fruit flies (used in every college biology course). With enough time and generations, you could probably develop fruit flies that eat meat, but it would take years and years. And I wouldn't want new pests at my picnic.