When spring comes and the snow disappears, it’s a special time for the capercaillie birds. The boy birds get ready to show off by spreading their tails wide like a fan. They also make funny noises like coughing and popping to get attention.
Another way to say this is: When the snow melts in spring, the male capercaillies put on a big show. They open their tails like a big fan and make silly sounds that go 'cough' and 'pop' to attract other birds.
It’s like they’re putting on a concert to say, "Look at me!" and find a friend!