Carpenter’s Column: Dark skies as the bird flies

“The three billion plus birds that migrate represent over 350 species of our regularly occurring terrestrial birds in the US and Canada.” — the website flockingaround.com

From the same website is this additional tidbit: “In North America, 80% of migratory birds migrate at night.” OK, class. Let’s do the math. 3,000,000,000+ times 80% equals two billion, four hundred million-plus birds that make nocturnal migratory flights.