Why is the Slimbridge reserve proud to be taking this action?

The Slimbridge reserve is proud to be taking this action because it is a haven for wetland birds, and the organization is committed to doing everything it can to protect its avian residents.

Home / Environment / Gloucestershire Nature Reserve Installs Bird-Friendly Window Film

Gloucestershire Nature Reserve Installs Bird-Friendly Window Film

Q: What technology is the WWT Slimbridge using to protect birds?

The WWT Slimbridge is using a UV-active window film that makes the glass detectable to birds, preventing them from colliding with the windows.

10 Nov, 2025

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Summary

UK nature reserve uses UV-active film to make windows visible to birds
Estimated 100 million bird deaths annually from window collisions in the UK
Slimbridge reserve proud to take action to protect its wetland bird population

Gloucestershire Nature Reserve Installs Bird-Friendly Window Film

As of November 10th, 2025, a nature reserve in Gloucestershire, UK has taken a significant step to protect its feathered residents. The Wildfowl & Wetlands Trust (WWT) Slimbridge has installed a special window film that makes the glass detectable to birds, preventing them from colliding with the windows.

This move comes in response to a major issue facing the UK's bird population. According to the British Trust for Ornithology, an estimated 100 million birds crash into windows annually across the country, resulting in a staggering number of fatalities. The new UV-active film technology used at Slimbridge allows the windows to remain almost clear to human eyes, while making them visible to birds, effectively tackling this problem.