Why are so many acorns on the ground in Chicago? It's a 'mast year

The abundance in acorns this fall is the result of a phenomenon that happens once every few years, in which oak trees produce far more acorns than normal.

My Oak Tree is Dropping Copious Amounts of Acorns!

Cindy Hernandez's Instagram, Twitter & Facebook on IDCrawl

Squirrels Have Gone Wild' Celebrating An Acorn Surplus

Mast ahead in production in a surprisely good year for nuts - Chicago Sun-Times

Why there are fewer acorns falling from trees in Ohio this year

Oaks & Acorns: The Mystery of the Mast – The Botanical Journey

Oak trees keep dropping acorns this fall. Here's how a 'mast' year impacts North Texas

The Lingering Mysteries of the Mast Year - Brooklyn Botanic Garden

Why Are There So Many Acorns in Illinois This Fall?

Ask the Master Gardener: Living in the land of 10,000 acorns this year - Brainerd Dispatch

Are Your Trees Dropping Acorns Like Crazy because winter will be tough? - Farmers' Almanac - Plan Your Day. Grow Your Life.

My Oak Tree is Dropping Copious Amounts of Acorns!

Why are there so many acorns in Sonoma County this year?

Could Fall's Acorn Abundance Forecast a Nutty Winter? - City Cast DC