Philadelphia ‘Lights Out Pledge’ Seeks To Prevent Bird Deaths

Migratory birds are often lured away from their normal paths by the bright lights of cities, with deadly results.

1 minute read

March 19, 2023, 7:00 AM PDT

By Diana Ionescu @aworkoffiction


Aerial Philadelphia cityscape by night with the City Hall tower in the foreground and Ben Franklin bridge spanning Delaware river in the back

Mihai_Andritoiu / Philadelphia, Pennsylvania

Roughly 100 Philadelphia buildings have signed on to a ‘lights out pledge’ aimed at preventing migratory birds from deviating from their migration paths and striking buildings, reports Bridget Reed Morawski in Next City. The Lights Out Philly program was developed over decades by Keith Russell and Audubon Mid-Atlantic, who tried to draw attention to the issue but had little luck until a massively publicized bird strike event in 2020.

“While light pollution initially draws birds into the city, it’s the combined effect of an abundance of lights and the resulting glare of windows and other reflective glasses that makes it hard to safely navigate — if those surfaces haven’t been modified with bird deterrent films or treatments, that is,” the article explains. “To help reduce migratory bird strikes and deaths, programs in Pittsburgh, Houston and Greensboro, N.C., and other cities across the country have focused on light pollution to encourage residents, businesses and municipalities to shut off their lights during late-night hours during typical spring and fall migration periods.”

These programs seem to have a powerful effect. “According to a 2021 study published in the Proceedings of the National Academy of Sciences, “decreasing lighted window area [to minimum levels historically recorded] could reduce bird mortality by ∼60%” at a large Chicago building.” 

Thursday, March 16, 2023 in Next City

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

Close-up of "Apartment for rent" sign in red text on black background in front of blurred building

Trump Administration Could Effectively End Housing Voucher Program

Federal officials are eyeing major cuts to the Section 8 program that helps millions of low-income households pay rent.

April 21, 2025 - Housing Wire

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

April 30, 2025 - Diana Ionescu

Close-up on Canadian flag with Canada Parliament building blurred in background.

Canada vs. Kamala: Whose Liberal Housing Platform Comes Out on Top?

As Canada votes for a new Prime Minister, what can America learn from the leading liberal candidate of its neighbor to the north?

April 28, 2025 - Benjamin Schneider

Washington

Washington State’s Parking Reform Law Could Unlock ‘Countless’ Acres for New Housing

A law that limits how much parking cities can require for residential amd commercial developments could lead to a construction boom.

6 hours ago - Streetsblog USA

Bluebird sitting on branch of green bush.

Wildlife Rebounds After the Eaton Fire

Following the devastation of the Eaton Fire, the return of wildlife and the regrowth of native plants are offering powerful signs of resilience and renewal.

7 hours ago - AP News

1984 Olympics

LA to Replace Inglewood Light Rail Project With Bus Shuttles

LA Metro says the change is in response to community engagement and that the new design will be ready before the 2028 Olympic Games.

May 1 - Newsweek

Urban Design for Planners 1: Software Tools

This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.

Planning for Universal Design

Learn the tools for implementing Universal Design in planning regulations.