In Mexico, a country full of symbolism and magical realism, hummingbirds — long associated with good luck when they cross your path and flutter around you — are captured and then “prepared” to reach the heart of the loved one. The shocking practice has become popular in recent years. It consists of carrying the small bird, dead and dry, inside your shirt pocket. This, we are assured, will let us find a partner for life. But so far, the only objectively measurable thing it has achieved is to put 39 of the 57 species that inhabit Mexican territory at risk of extinction, according to data from the International Union for Conservation of Nature.