Answer to Previous:
Most of you were in the ballpark but unsure of which bird was which species. To those of you who said the left bird is Song and the right Lincoln's, you are correct! Andy's reasoning does a good job of explaning why, so I won't repeat.
To add, I know it's hard to see in the photo, but the right bird is less bulky (something easily felt in the hand). Also, the right bird has a buffy-washed flank whereas the left bird does not.
This next photo has not been identified by anyone. Neither the photographer nor I know what it is. The photographer has asked for a little help in pinpointing an ID…..so here you are
Courtesy of Alexandria Simpson, taken in Weslaco, Texas (Hidalgo County) on September 15, 2009