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Was sind diese runden Formen?

22.02.2025

chicken_tenders_plz on 22.02.2025 2:10 p.m.

My wife and I traveled to Germany last fall and we saw these perfectly round shapes (invasive vegetation?) in many trees. What are they?
sakasiru on 22.02.2025 2:40 p.m.

Mistletoe
LemonfishSoda on 22.02.2025 2:42 p.m.

Looks like birds‘ nests.
megiddox on 22.02.2025 2:56 p.m.

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcT4iwGCHyAo3Lt5KQU5oezMQuJdWG_jUIdxHA&s
Little-Bear13 on 22.02.2025 3:04 p.m.

Probably genetic mutations or something like that
Wolfof4thstreet on 22.02.2025 3:13 p.m.

I used to think those were giant nests