I'm guessing this is a non-breeding adult golden crowned sparrow:

Click image for larger version.  Name: Golden-Crowned-Sparrow.jpg  Views: 216  Size: 191.1 KB  ID: 66263


Yup, it's the northern harrier again:

Click image for larger version.  Name: Northern-Harrier-Hunting.jpg  Views: 229  Size: 140.0 KB  ID: 66264

Tree swallow:

Click image for larger version.  Name: Tree-Swallow-Landing.jpg  Views: 194  Size: 177.7 KB  ID: 66265


Violet green swallow:

Click image for larger version.  Name: Violet-Green-Swallow.jpg  Views: 201  Size: 123.5 KB  ID: 66266


How do you know this is not a tree swallow?
Click image for larger version.  Name: Violet-Green-Swallow-Foraging.jpg  Views: 183  Size: 124.6 KB  ID: 66267



Question: Is it possible to get a full-frame shot of a flying swallow without using any device to let the bird trigger the shutter?