Night Wildlife

Moth Welfare and Light Pollution Navigation Disruption

Moths are severely disrupted by artificial light at night, which disorients their navigation, disrupts mating behaviour, and causes exhaustion through circling around light sources. UK moth populations have declined by 33% since 1968.

Key Facts

UK moth populations have declined by approximately 33% since 1968
Light pollution affects over 80% of the UK population by area
Moths use moonlight for navigation and are disrupted by artificial lights that simulate it
Moths circling around light sources expend energy and face predation from bats, spiders, and birds
Some moth species are more light-sensitive than others, leading to community composition shifts

Welfare Considerations

Moths attracted to artificial lights circle persistently, exhausting energy reserves and exposing themselves to concentrated predation by bats and spiders. Disruption to mating behaviour reduces reproductive success. Migrating moths whose navigation is disrupted by light pollution may fail to reach suitable habitats. While moth sentience is uncertain, the scale of population decline suggests enormous numbers of individual welfare events linked to light pollution.

What You Can Do

Switch to warm-spectrum, low-UV LED lights that are less attractive to moths
Use motion-sensitive outdoor lighting rather than always-on fixtures
Turn off unnecessary outdoor lights after midnight
Support Butterfly Conservation moth recording schemes
Advocate for dark sky buffers around nature reserves and wildlife corridors