
You are looking for a living, moving louse, ranging in size from a full stop to a sesame seed depending on their age.

When it first hatches, a young louse (known as a nymph) is transparent but after its first blood meal, it will darken to a greyish brown colour.

Head lice live on, or very close to the scalp and don’t wander far along the hair shaft unless encouraged to move to a new head.