Tonight, while you sleep, billions of birds will fly directly over your house.
You won't see them. You won't hear them. But weather radar will.
→ 1-2 BILLION birds cross the US on peak migration nights
→ Most fly at night (cooler air, fewer predators, stars for navigation)
→ Altitude: 2,000-6,000 feet
→ Speed: 20-50 mph depending on species
→ Duration: some fly 18+ hours nonstop
BirdCast — a Cornell Lab project — uses weather radar to track migration IN REAL TIME.
Right now, the spring wave includes:
→ Warblers (40+ species heading north)
→ Thrushes
→ Sparrows
→ Tanagers
→ Orioles
→ Some hummingbirds
The DANGERS of night migration:
→ Light pollution draws birds down into cities (they use stars to navigate)
→ Lit buildings kill an estimated 600 million birds per year in the US
→ One night during peak migration, a single lit building can kill dozens
What you can do:
→ Turn off non-essential lights during peak migration nights (March-May)
→ Close blinds and curtains
→ Check BirdCast for migration forecasts
→ "Lights Out" programs in major cities save millions of birds
The sky above your house tonight is not empty.
It's a superhighway.
2 billion travelers. No headlights. No rest stops.
Spring bird migration is the LARGEST movement of living things on Earth.
#TheOutpost 🐦🪶