A “circle dance” of passerines in winter

You can often hear noisy flocks of forest passerines led by tits.
This typically reclusive family of birds includes Eurasian nuthatch, various creepers, crested tits, marsh tits, Eurasian blue tits and great tits….
Many of them flock together, sometimes along with other species, forage for food and snuggle up to each other to retain their warmth. These flocks also reduce the need for constant lookout for predators. Most of these birds stay active during winter and feed on nuts, dried fruit, seeds, twigs and branches. The only exception is the robin, which doesn't participate in winter flock life.