Watching hummingbirds fight over a yard full of flowers and feeders is pretty comical. These little birds are extremely territorial and can get
violent at times. Then I remembered reading a research paper a while back about prostitution in hummingbirds. 🤣 Here it is, published in 1975.
https://academic.oup.com/condor/article-abstract/77/2/140/5205491
And there is also newer one published a bit more recently in 2005. 🧐