It must be summer. The plain swifts (Apus unicolor) are back at the Roque de Los Muchachos. These birds are native to the Canary Islands and Madiera, but some overwinter in North Africa. I don’t know where these ones disappear to in winter, but it’s always nice to see them back, zipping acrobatically around the telescopes.
It’s feeling like summer here today, too.