It's an amazing piece of acrobatics, far better than anything that we could do in a helicopter... and it's all done in order to impress the female, to show her that he is superb at holding his territory.
See on hämmastav õhuakrobaatika, kaugelt parem ükskõik millest, mida inimesed helikopteriga teha suudaksid, ja tegevuse ainus eesmärk on emasele muljet avaldada ja talle näidata, et isane saab territooriumi hoidmisega suurepäraselt hakkama.