Leucistic Purple Sandpiper
A hybrid Wigeon
A strange Swallow. It matches no species, and is probably some aberrant Barn Swallow or perhaps a hybrid.
A hybrid duck
Another hybrid duck
Discussion of the hybrids on ID-Frontiers
Odd variant or hybrid Western Kingbird
And finally, the oddest bird of all, tentatively identified as a Wink, sighted in an intro biology class: