What is worth noting
Noises at certain times, visible activity, damaged packaging or traces near an access point: indicate precise locations and frequency. Avoid inferring the species from noise alone.
Access points matter too
A gap under a door, a pipe or a recent building change can provide context. Photograph visible access without dismantling anything or entering a hard-to-reach area.
Before an intervention
If you hire a professional, ask how they plan to identify the presence, address access points and explain follow-up. Scope and terms must be confirmed directly with them.