While there is less research on sand lizards than adders, the review found that both species are affected by a complex combination of pressures, rather than any single threat acting in isolation.

Declines are often linked to the combined effects of habitat change, environmental pressures and human activities over time. These pressures are also compounded by species-specific vulnerabilities including habitat requirements or small, isolated populations, contributing to lower breeding success, increased mortality and, in some cases, local extinctions.

Within this broader context, evidence relating specifically to gamebird release and associated management is limited. Only a small number of studies directly referenced these factors, often with little detail and relying largely on anecdotal observations. Where interactions were identified, pheasants were suggested as opportunistic predators of reptiles, particularly juvenile adders.

Habitat management and potential changes in predator communities were also highlighted. However, there is currently insufficient evidence to determine the scale of these effects or their influence on reptile populations, and any impacts should be considered alongside the wider suite of pressures affecting these species.

Habitat management emerged as the most effective way to support conservation of these reptiles. Maintaining connected habitats with varied features and key breeding and hibernation sites was associated with more positive outcomes for both species.

The review highlights significant gaps in our understanding of the relationship between gamebird management and reptiles. Further research is needed to better understand these interactions and inform evidence-based management.

This review is not peer-reviewed and is intended to support internal discussion, inform policy considerations, and guide future research priorities within BASC.