When a breeding location frees up, woodpeckers fight each other in teams in a conflict lasting up to 10 hours per day for nearly a week
Source:
https://www.newscientist.com/article/2253867-woodpecker-battle-royale-sees-teams-of-birds-fight-for-nearly-a-week/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home