Yesterday, I saw this tiny bird (zoom in on the top of the tree) while I was out for a walk.

Nothing about its shape or size or actions caused me any concern but when it said. “Tweet, tweet!” , like a person doing a very poor imitation of a bird, my suspicions were raised.
Nice try, spy-bird. Nice try.
PS – Before you send someone to do a wellness check: Yes. the bird sounded like a person saying tweet. No, I don’t actually think it was a spy.