Here’s some mildly satisfying data on this topic: https://docs.google.com/spreadsheets/d/1fliiB5RgbYx9-N88R-xPMsUfDVjfnLLo9p_tKERKJrQ/edit?usp=sharing
These are numbers from the most recently-added ~100,000 photos (as of a week ago and change, when I exported them), so they might be wildly distorted by the Penang Incident, which might explain the somewhat extraordinary number of bird photos added with phones. Sort of interesting to see that a lot of bird photos come from bridge cameras.
Might be fun to make something more like Flickr’s camera tool at some point. The temporal aspect is definitely interesting.