Garden Tiger Moth Welfare and Climate Threats

The garden tiger moth is one of the most dramatically colourful UK moths whose populations have declined significantly due to climate change and habitat loss.

Key Facts

Garden tiger moth populations declined approximately 89% in Britain over 40 years
Climate change causing milder wetter winters has been identified as a key driver of decline
Their hairy caterpillars, known as woolly bears, feed on a range of low-growing plants
Adults do not feed and live for only a few days to mate and lay eggs
The bright warning colouration of adults signals their toxicity to potential predators

Welfare Considerations

Garden tiger moth welfare is primarily threatened by climate change through multiple mechanisms. Warmer wetter winters cause direct larval mortality as caterpillars cannot tolerate the combination of moisture and mild temperatures. Changes in host plant phenology may affect caterpillar feeding success. The dramatic decline in abundance means interactions between individuals have decreased, potentially affecting mate-finding success. Light pollution affects adult behaviour during the brief reproductive life.

What You Can Do

Create wildlife-friendly gardens with diverse native plants that support caterpillars
Reduce outdoor light pollution that disrupts moth behaviour
Participate in citizen science moth monitoring schemes
Support climate action that reduces the rate of warming affecting moth populations
Reduce pesticide use that eliminates caterpillar host plants and prey items