Franklin's Gull at avenida Balboa

Darién Montañez had a pretty good view of a Franklin's Gull in breeding plumage when his taxi was zipping down Avenida Balboa. The characteristic chunky jizz was what first called my attention, and the wing pattern (on the upperwing black tips separated from the gray mantle by a broad white band above, and below black tips contrasting sharply with the white underwing) confirmed my suspicions.