Black-Capped Chickadee

When shooting small birds like the Black-Capped Chickadee, the longest focal length you can afford is usually the best choice. In this case, 800mm of focal length nicely separated the Chickadee from the not-too-distant background.
 

Picture Specs & Equipment Reviews

800mm  f/7.1  1/160  ISO 640     Size: 5616W x 3744H  
 
Canon EOS 5D Mark II  
Canon EF 800mm f/5.6 L IS USM Lens