It's easier to see when that first leaf shows up on a tree than it is to see whenthat first leaf falls off. Birds will often have, at least in the northern hemisphere, their breeding season is in the summer. And so there are those kinds of things with certain animals. But if they don't get that chilling requirement, if we were to have a really warm winter, for example, and doesn't get cold enough for them to meet their chilling requirement then their spring phenology can be thrown off.
The seasons are a-changin'! It's sweater weather in both hemispheres and seasonal researcher and expert Phenologist Dr. Libby Ellwood weighs in with amazing information about why fall smells so good, why leaves change color, why we like to cronch them, historical records of blossoms and twigs, bird migrations, Daylight Savings, seasonal mythbusting, pumpkin spice vs. apple cider, the best temperature to wear sweaters, why the Halloween aisle springs up in summer and how global temperature shifts affect the whole food web. Bonus: the most candid, touching thoughts Alie's ever heard from a scientist studying climate. Get this one in your ears and hearts.
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