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Short Wave listener Shai Tsur wants to know why his Callery pear tree started blooming ... in January. Are these dense white flowers a normal occurrence? Or an indicator of climate change?

This is the first episode of Nature Quest, a monthly Short Wavesegment that answers listener questions about your local environment. Every month, we'll be bringing you a question from a fellow listener who is curious about how nature is changing – how to pay attention to the land around us – and make every day Earth Day.

Shai Tsur lives in Oakland, California. He's used to seeing flowers bloom in his neighborhood: pear trees, plum trees, California poppies. But not in January.

This past winter was warmer than usual, Tsur says. "The 70 degree weather in December and January was starting to happen here."