Small Shorebirds Feast On Green Slime To Fuel Their Long Migration

Shorebirds wade in shallow waters along shorelines searching for food. More than a million shorebirds visit the San Francisco Estuary each year during their migration to feast on insects, worms, clams, and crabs that live or under surface of sand mud. The abundant food provides with energy they need migrate thousands kilometers, between breeding areas Arctic wintering Pacific coast North South America. Scientists have discovered that, migration, small species eat green slime called biofilm grows Larger do not biofilm. This article describes how bills tongues help them biofilm, what is, why is an important those birds migration.