Erinaceus europaeus
Hedgehogs are small nocturnal mammals covered in about 5,000–7,000 spines that they erect and puff into a ball when threatened. They roam large territories each night, snuffling loudly as they root out beetles, caterpillars, and slugs, which makes them welcome guests in gardens. When they meet a strong smell they may 'self-anoint', licking the source and spreading frothy saliva onto their spines. Road traffic and habitat fragmentation are their main dangers, and numbers are falling in parts of western Europe.