A bird wearing a speedo is balancing on a tree limb with wings outstretched.  A couple are standing below the bird looking at it, with an outstretched book in the man's hands
It's unusual to see birds wearing human clothing
Why is the bird wearing that speedo?
It's a thongbird.
scene: a forest description: A bird wearing a speedo is balancing on a tree limb with wings outstretched. A couple are standing below the bird looking at it, with an outstretched book in the man's hands uncanny: It's unusual to see birds wearing human clothing entities: Bikini, Birdwatching. caption: It's a thongbird.
A play on the word "songbird", which is a common type of bird. Here, instead of the birdwatchers seeing a songbird, they see a similarly sounding "thongbird", which is identified because the bird is wearing a thong.