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The evidence behind the experience

Good design starts with good sources.

PaneGuard turns published bird-window guidance into a practical planning experience. These are the primary references for the facts and recommendations in the app.

Last reviewed September 23, 2026
01

U.S. Fish & Wildlife Service

Threats to Birds: Collisions (Buildings & Glass)

The scale and setting of bird-glass collisions in the United States, and how reflections, landscaping, and lighting can affect birds.

  • More than one billion birds collide with glass annually in the U.S.
  • Most fatal collisions occur at homes and buildings shorter than four stories.
  • Reflections of sky and vegetation can make glass appear like habitat.
Read the original source
02

American Bird Conservancy

Solutions for Homes

Practical guidance for choosing windows to address and applying visible treatments to residential glass.

  • The preferred spacing is two inches or less in both directions.
  • Exterior placement keeps markings visible against strong reflections.
  • Dots and similar shapes should be at least one-quarter inch across; stripes at least one-eighth inch wide.
Read the original source
03

United Nations

Sustainable Development Goal 15 — Life on Land

The United Nations goal focused on protecting terrestrial ecosystems and halting biodiversity loss.

  • Reducing preventable bird mortality is one practical contribution to biodiversity conservation.
  • PaneGuard’s SDG connection is a project aim, not a measured impact claim.
Read the original source

How PaneGuard uses this evidence

A screening tool, not a prediction.

PaneGuard asks about characteristics associated with collision hazards and uses a transparent scoring heuristic to suggest a treatment priority. It does not calculate an exact probability of collision or certify any window as collision-proof.

The visualizer uses American Bird Conservancy's close-spacing guidance as a planning reference. Layout counts are approximations; check the instructions for your chosen product before installing it.

Your photo is processed locally in your browser. PaneGuard does not upload it to a server.

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