Date: 4/6/25 11:21 am From: Greg Russo via groups.io <gregorythomasrusso...> Subject: [southbaybirds] Possible Nuttall’s x Ladder-backed Hybrid Pair Nesting in San Jose
I wanted to share a sighting from this morning (April 6, around 10:30 AM) that might be of interest to folks who enjoy woodpecker puzzles. I have not been home yet to double check field guides, but it was interesting enough that I thought I would throw it out to the group.
While birding at the Santa Clara valley water District(coordinates: 37°14′51″ N, 121°52′16″ W), I observed what appears to be a pair of Nuttall’s x Ladder-backed Woodpecker hybrids actively nesting.
The female showed a striking yellow wash across the lores, forehead, and throat—definitely unusual for Nuttall’s and not something you’d expect on a pure Ladder-backed either. The male had a full red crown (adult) and a fainter yellow wash around the base of the bill. Both birds showed a mix of field marks: cleanly barred backs, lightly spotted flanks, and bold facial patterns—traits falling between the two species.
Based on photos and behavior (they were attending a cavity), this looks like an active nesting pair. I know Ladder-backed is quite rare in the county, and while hybrids aren’t unheard of, it seems like a notable pair—especially with both birds showing signs of mixed ancestry.
Photos are available if folks want to take a look. Just thought I’d put this out there in case anyone nearby wants to check it out.
Do not disclose information that identifies the location of nesting birds of any species, to minimize stress on the nesting birds and the risk of vandalism or abuse.
