Almost all DSLR’s will make a good job. However, if you’re planning to photograph birds in flight, pay attention to fps (frames per second), high ISO results and AF (autofocus) system’s accuracy. If you don’t have a DSLR camera, then bird photography becomes a bit more difficult (especially due to slow AF), but don’t give up – a good photographer, I believe, will make better bird photos with mobile phone than a poor one with the most expensive equipment.
