- I posted a picture of some gulls that we saw during the San Joaquin Wildlife Sanctuary monthly bird walk in the "99 Mystery Birds" album. The gull on the top left is a California Gull. We think the gull on the bottom left is a Herring Gull (pink legs, yellow iris, red & black on bill, lighter grey wings), but I'd like to verify that. I'm not too good with the juvenile gulls. Does anyone know what the juvenile gull is?