Lovely, but behind there is only pragmatism:Sodium and some of...

Lovely, but behind there is only pragmatism:

Sodium and some of those other micronutrients are hard to find in nature,“ explained Carlos de la Rosa, an aquatic ecologist and director of Costa Rica’s La Selva Biological Station, to National Geographic. "Butterflies and bees consume nectar, and nectar does not have a lot of salt. But they still need salt for egg production and for their metabolism.” […] They often sip on animal urine, muddy river banks, sweaty clothes and sweaty people. Given the chance, butterflies will also drink crocodile tears.

Via HuffPost Science: Striking Photo Captures Butterflies Drinking Turtle Tears