The Tits are birds that occupy the wooden houses that we humans place in our gardens. The blue Mallerenga is known for its skills when it comes to finding food.

In the mid-twentieth century, in England, it was common to deliver milk directly to homes, leaving one or more bottles at the door of each house, but they soon discovered that blue Mallerengas had become accustomed to drinking the cream from the top. British dairy companies decided to put a metal seal as bottle caps, which was not an impediment to the ingenuity of this small bird that quickly learned to open them again with its beak.