From National Audubon
Providing Safe Passage for Nocturnal Migrants
Every year, billions of birds migrate north in the spring and south in the fall, the majority of them flying at night, navigating with the night sky. However, as they pass over big cities on their way, they can become disoriented by bright artificial lights and skyglow, often causing them to collide with buildings or windows.
Contribute to Lights Out
- Turn off exterior decorative lighting
- Extinguish pot and flood-lights
- Substitute strobe lighting wherever possible
- Reduce atrium lighting wherever possible
- Turn off interior lighting especially on higher stories
- Substitute task and area lighting for workers staying late or pull window coverings
- Down-shield exterior lighting to eliminate horizontal glare and all light directed upward
- Install automatic motion sensors and controls wherever possible
- When converting to new lighting assess quality and quantity of light needed, avoiding over-lighting with newer, brighter technology
READ MORE HERE
Reminder –
We’ve had several Ruby-throated Hummingbirds passing through our garden and one male is checking in regularly. There isn’t much yet available in the way of nectar plants blooming, either in fields or gardens. If you place your feeders out at this time year, you may encourage a female to nest in your garden. Every year we see (mostly) females, and by summer’s end, two juveniles appear at the feeders. I wish I could see their nest but it is so small, merely the size of a walnut! 
Don’t you love this poster for Lights Out for Birds!