Western Grebe chicks (Aechmophorus occidentalis), Lake Merced, San Francisco, CA. © 16
May 2010 Joseph Morlan
These two grebe chicks were pestering two adult Western Grebes and begging for food. Both Western and Clark's grebes now breed at Lake Merced, but in the past I have only seen chicks of the Clark's Grebe. The back bird has a paler crown than the front, but I believe the gray crown extending all the way to the bill identifies both as Western Grebe and not Clark's.
Nesting is a relatively recent phenomenon at this site. Neither species is included in the San Francisco Breeding Bird Atlas and it's encouraging to see their success.
Digiscoped with Panasonic DMC-LZ5 | Nikon FieldScope 3 | 30X WA | hand-held (no adapter)