Why do the chicks come knocking on the windows? Here's what it really means

The morning is quiet, the soft light filters through the curtains... when suddenly, a small regular toc-toc attracts your attention. A delicate and lively mesange comes knocking with a beak against the glass. A charming, almost magical scene, which gives rise to a thousand questions: why does this bird seem to sash on the window? Does it seek to enter? Is it disoriented, or does it try to communicate something? This behavior, as surprising as it…