I know some people call them rats with wings,  but I love seagulls (though definitely better mid-air than squawking after scraps), maybe exactly because they seem sort of like hard-trying underdogs striving to be majestic, which for me is exactly what this RPPC captures, along with some good moodiness. I've included one detail that gives a sense of how silvery the photo is; very nice.

3 1/2" x 5 1/2" with a little bumping to the corners and used back reporting on one hour spent in Seaside and noting that this was the prettiest postcard our sender could find!