✔️The Eurasian nuthatch or wood nuthatch (Sitta europaea)
These guys are very lively and active. I was always amazed at their dexterity and the ability to climb trees in different directions and even upside down. I noticed that they are quite greedy. If the rest of the visitors to the feeders calmly, in a hierarchical order, take one seed and fly away where no one will disturb them. Then these guys can fly right into the crowd of great/willow/coal tits, completely out of line, pushing everyone away, and after that try to pick up as many seeds as possible in their beak, as a rule, I watched, more than 3x does not fit.
After this uncultured outrage, they fly to the tree to rid the seed of the husk. They hold the seed in their beak and beat it like a chisel, and then hide it in various cracks, crevices of the bark.
