Capercaillie  (Tetrao urogallus)

Lek: site where 'lekking' takes place. Lekking is a system of mating in which males display collectively. Males compete for the best sites within the lek and females then choose whom to mate with on the basis of the display.
Lekking: system of mating in which males display collectively in an area known as a lek. Males compete for the best sites within the lek and females then choose whom to mate with on the basis of the display.