For several decades, there have been fewer swallows in France. - Kostyantun Pazyuk / Getty Images Plus

They arrive earlier and earlier and less and less. In swallows, for some time now, it has not been flying straight. Global warming and the gradual destruction of its habitat endanger this mosquito-loving animal, which is particularly useful for the environment.

The good news is that if the swallow does not return the spring any more, it would be relatively easy to bring the highly migratory back to mainland France. Rachel Mulot, head of the investigation department of Sciences et Avenir , helps us to prepare a nest to match the messenger of sunny days. Prepare your mud balls and, above all, enjoy listening!

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