Researchers have observed Japanese tits (Parus minor) fluttering their wings to noiselessly tell mates to enter the nest first. It is the first known case of symbolic gesture in a nonprimate animal.
Read more: https://www.sciencenews.org/article/fluttering-wings-bird-body-language
Video: Toshitaka Suzuki
Japanese tit gesture to mates by fluttering their wings | Science News
