Castelló d’Empúries, Spain — Each week for the last 25 summers, biologist Constantí Stefanescu has walked a line through a series of fields in Catalonia, counting butterflies. On a sun-beaten day last ...

The ant mounds on the heath, in the forest and in your garden are oases for life. The heat and nutrients from ant mounds make them the perfect home for unique plant and animal species, according to ...

A caterpillar of <i>Maculinea alcon</I>, having recently emerged from a flower of <i>Gentiana pneumonanthe</I> is carried back to a nest of the ant <i>Myrmica rubra</I> by a foraging worker ant. This ...

Cuckoos lay their eggs in other birds' nests. The nest owners, none the wiser, cherish, brood, and raise them. In the insect world, there is something that puts the cuckoo to shame. Caterpillars of ...