boys and gulls

To my ears, those who speak with a certain shade of British accent pronounce "girls" so that the word sounds like "gulls." But that's just me. So, the other day two seagulls were on the roof, on the roof of an attic window, above and beyond my apartment. I had never seen these two gulls before, not that I recall. They were squawking and strutting. It seemed they were arguing or posturing. As those things go, I assume they were two male birds fighting for territory or mating rights or ornithological semantics.