[EBB Sightings] Golden-crowned sparrows

I was struck by the diversity of habitat of this bird yesterday on two 
separate viewings.

At mid-day, I checked up on what seems to be an ongoing habitat in a 
stretch of rosemary and other shrubbery on Ptarmigan Drive in the very 
settled Rossmoor neighborhood. Its a warm, protected spot. A month or 
two ago, I watched them picking away at the purplish flowers of the 
rosemary plants there.

Then last evening, I was atop the last northern hill of the San Pablo 
Ridge, near the  satellite-cable TV installation and EBMUD's Pearl 
Reservoir (water tank). Way the heck up there, where the wind blows 
24/365, a small group of these birds were clinging to a chaparral type 
of bush (we call it greasewood but I don't know its real name), 
apparently picking at buds or something. They were pretty bold about my 
presence, only flying over to the next bush as I neared them for a 
closer look. I wondered if they nest up there. A very adaptable bird, 
like other sparrows, I guess.