THE EARTH GIVES US SIGNS , if we know how to read them. Some scientists obsessively track environmental fluctuations like shifts in precipitation and insect populations in search of early warnings of climate change. But one co-inhabitant of Earth can teach us more about the climate than any other: birds. From the soft buzzing of the hummingbird’s wings to the sweet whistle of a warbler, birds are constantly communicating. Through their actions and very existence, they’re also sending us a message. It’s time to listen. Learn about these beautiful, essential creatures and the incredible impact they have on the planet, below. credits - www.luizclas.com 1 . Birds pollinate plants . As the canary in the coal mine metaphor suggests, when the birds are in trouble, so are we. Birds perform invaluable ecosystem services necessary for our survival, like pollinating plants and dispersing seeds to help countless species of plants survive. 2 . Birds help in pest control. Birds con