Do not use the same sampling tools for different samples.
1. Using a permanent marker, carefully label a sterile tube (e.g. 1.5 mL tube) with a unique Tube ID.
2. Wearing gloves, use sterile tools (tweezers, spatula etc.) to transfer the faecal sample into the labelled tube. Avoid breaking the pellet upon collection. Fresher, intact pellets have a higher chance of success than older ones. If pellets are collected from single species roosts you can put multiple pellets into a sampling tube. Collecting multiple pellets improves our chances of species identification but is not prerequisite to our success. If it is a mixed species roost, put one pellet per sampling tube. If you are unsure, put one pellet per tube. Mixed species samples will be inconclusive.
3. Place the sample tube into a bag.
4. Use a new labelled sample tube and tools for each sample.
5. Once all samples have been collected, simply use the standard postal service with recorded delivery. Follow the packaging notes and send to: Nature Metrics, 1 Occam Court, Surrey Research Park, Guildford, GU2 7HJ, United Kingdom.