One of my favorite new additions to the yard is the black-throated sparrow (Amphispiza bilineata) (BTSP) (it has a lovely song, which you can hear through a link on the Cornell Bird site (linked above), or by clicking here and here. I prefer the second links because they capture more of the lyricism than the Cornell clips. These sparrows in particular are bold, curious, and vocal. They're a great addition to the yard, because they enjoy hanging out "where the action is", usually in a shrub nearby where I'm working in the yard, often making their high-pitched twinkling calls and songs.
Sounds like the sparrows' population is in decline, mostly linked to hotter-burning fires in the Great Basin region and habitat conversion, which is too bad. Here's a nice little essay about the loss of BTSP due to suburbanization.
The BTSP prefers habitats with mature cacti and enough vegetation to provide their seed-based diet (they also eat insects, esp during breeding and nestling season). It was a nice "compliment" to the yard to have the BTSP choose to call it his territory and decide to breed here.
Seems its not as easy as just showing up - in the three years that a BTSP has called the yard his territory (I assume its the same male, but we can never be sure unless we banded him), there have been only 2 years where a mate has shown up and they've bred. In fact, this year, I wasn't 
even sure if a female sparrow was in the yard (in this species, the male and female have the same plumage, which means that, unless you see two sparrows hanging out togther, you don't know you have more than one). Then, I was looking out the back door, and, lo - I saw it!! The baby black-throated sparrow!! The pic to the left is the first one I was able to snap of the chick. You can see that it still has that big-billed baby look. There is no black throat and the white eyebrow is just begining to form. 
The chick has the characteristic brown speckling that many baby birds have - great camo in the nest, in shrubs, and on the ground!
even sure if a female sparrow was in the yard (in this species, the male and female have the same plumage, which means that, unless you see two sparrows hanging out togther, you don't know you have more than one). Then, I was looking out the back door, and, lo - I saw it!! The baby black-throated sparrow!! The pic to the left is the first one I was able to snap of the chick. You can see that it still has that big-billed baby look. There is no black throat and the white eyebrow is just begining to form. 
The chick has the characteristic brown speckling that many baby birds have - great camo in the nest, in shrubs, and on the ground!The pic on the right was taken just a couple days later. The chick has already developed the characteristic white eyebrows. The black throat won't appear until the winter molt. To the left is one of the babies (there ended up being 2 this year!) begging in a shrub. 
I heard the typical BTSP chirping; but this time it was particularly high pitched. Chasing down the sound, I found the baby perched within the safety of the many-branched creosote bush shrub, loudly begging for food. It would also flutter its wings rapidly. The pic isn't in focus - my cheap point-and-shoot camera couldn't focus very well with all the random branches. An example of why the baby uses the shrub for cover!
I heard the typical BTSP chirping; but this time it was particularly high pitched. Chasing down the sound, I found the baby perched within the safety of the many-branched creosote bush shrub, loudly begging for food. It would also flutter its wings rapidly. The pic isn't in focus - my cheap point-and-shoot camera couldn't focus very well with all the random branches. An example of why the baby uses the shrub for cover! I sure hope this successfull nesting event means more black-throated sparrows in our yard many years into the future!
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