Fig 1) These two juveniles are siblings, from the same nest, on a rooftop in Seattle, August 1998. The parents were a Glaucous-winged Gull and an apparent hybrid Gl-W x Western Gull. The bird on the left looks like a typical hybrid, a kind of chocolate-flavored Glaucous-winged Gull. The bird on the right however, is dark enough to pass for a pure Western. Photo courtesy of John Chapman, copyright 1999.

Fig 2) Apparent first summer bird (by worn scapulars and primaries) molting into second winter (notice the marbling on the tertial tips, typical of second year plumages). Photo courtesy of Don DesJardin, copyright 1998.

---