With the arrival of Spring, birds are busy building their nests – warblers, blackbirds, wrens.

Blue tits usually nest inside hollow tree trunks. In the absence of natural cavities, we install nest boxes to provide suitable conditions for nesting.

Last autumn, we built several nest boxes in a family workshop led by the Portuguese Society for the Study of Birds.

One of them is fitted with a camera, offering a glimpse inside.

Now, with spring underway, a family of blue tits has moved in and is hard at work, carefully building a comfortable home. Watch it unfold, live, inside the nest.

The chicks are born extremely fragile, blind, featherless and entirely dependent on their parents for food and warmth. They remain in the nest for a relatively long period (around 18 to 21 days in the case of the Blue Tit) until they are fully developed and ready to fledge.