At Stow Lake yesterday, we came upon a couple looking at something. We stopped to see what it was. There on the ground was a red crayfish. We’d never seen one at Stow Lake before, and neither had they, though they visit often. I pulled out my camera.
“You have a camera?” the lady asked. “We came from someplace else, so we didn’t bring ours.”
Even better, my companion had an iPhone. He could take the photo and instantly send it to their email address. Which he did.
Here’s the iPhone picture of the crayfish.
(We’re still wondering what it’s doing there, on the dry dusty path.)
When they emailed back to thank us, they sent us this enchanting picture of three baby Great Horned Owls in Golden Gate Park.
When I asked for permission to publish it, they agreed. In a follow-up they said, “One of the really nice things in the park is sharing wildlife, especially with people who may not have ever seen owls, or herons, or bats…”
Couldn’t agree more. We’re so fortunate to have this wonderful park ten minutes from our neighborhood.
FOREST KNOLLS NEIGHBORHOOD 
I once saw a large crayfish in the middle of JFK Drive at Rainbow Falls. Good thing it was Sunday, so no cars to smush it. I believe it was trying to cross the street.
Crayfish will spread to just about any creek or lake. Used to catch them in the old fountains at the Music Concourse. when I was a kid of course :).