Many ornithologists use mist nets to capture birds briefly to collect key data or ring them before release. Photographer and birdwatcher Todd Forsgren has spent years working with researchers to freeze-frame those moments, now collected in Ornithological Photographs (Daylight Books).  He talks about the ethics of mist netting, the challenge of photographing hummingbirds, and upcoming projects such as photographing the lengths we go to to rescue critically endangered species.  Read more