The tiny insect, the scarce yellow sally, is bred in a zoo, raising hopes for saving the species.
Scarce yellow sally has always been a rarity. The insect was recorded now and again in British rivers between 1959 and 1995, but then vanished. It also disappeared from an assortment of European countries.
Thirty of the tiny insects were captured in the river and taken to Chester Zoo. They were raised in aquariums set up to mimic the conditions of the river bed, involving manipulation of oxygen levels, light and temperature.Insect populations in freshwater are shrinking due to pollution and loss of habitat
In the process, they solved many mysteries: counting eggs the size of a grain of sand, observing the aquatic nymphs growing and feeding, and watching the young emerge as flying adults about half an inch long.
Belgique Dernières Nouvelles, Belgique Actualités
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