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Aggressive behaviour of growing in number several species (bison, lynx, red deer, brown bear and elk/moose) to wolf pups makes wolf parents switch their denning from open couch to burrows.
Details https://sidorovich.blog/2021/06/30/vi...

Highlights:
Wolves throughout the whole video
Eurasian lynx 00:20 00:54 9:55
Red fox 1:08 4:45
Raccoon dogs 4:54 6:20
European badger 1:04 6:11 8:04
Wolf pups 10:27 10:39
Wolf mother carrying pup 10:52