Nest box survey schemes for hazel dormice provide critical population monitoring data and direct conservation benefit while requiring welfare-sensitive handling protocols for these delicate animals.
Dormouse handling during nest box surveys represents a minor welfare cost justified by the conservation benefit of population monitoring data. The welfare protocols are carefully designed to minimise stress: surveys are conducted at appropriate ambient temperatures to avoid rousing torpid animals, handling is brief and gentle, and disturbed nest material is replaced to preserve insulation. Dormice found in torpor are replaced in their nest boxes rather than handled. The conservation benefit — enabling population trend detection that informs habitat management decisions — is substantial and directly serves long-term dormouse welfare by protecting and improving habitat. Survey participants are trained specifically in minimal-stress handling protocols before participating.