I sometimes wonder if the goal of climate science papers is for the last line of the conclusion to consist of just acronyms, a few little words, and a verb. By comparison photographers use hardly any acronyms. One is BIF which stands for Bird in flight. So here we have BOP - Birds on posts.
The ravens in the top photo are at Bryce Canyon while the crows in the lower photo are hanging out at the temporary huts on Kamakura beach. The ravens seem to like having their photos taken, but pointing a camera at the crows pisses them off and they soon flap away in a very deliberately annoyed manner.