Swallows on a Sunday Afternoon

I found this in an old book of mine.
I had written it one morning while in DC .

The swallows overtake the sky
Like bees out of the hive,
flying this way and that
among puff-white mine fields
that hang quietly in the blue,
they swoop and flutter like fighter pilots
on a friendly flying mission.

“I wonder if somebody died,” I say aloud
as I watch a yellow monarch flutter past my window.
The two emergency vehicles were cause enough for concern.
“It wouldn’t be the first time,” I think to myself,
“that somebody dies on a clear and sunny Sunday afternoon.”