From beetles to flies, moths and spiders, firs can be magnets for creepy crawlies. 'We've seen significantly higher insect numbers throughout 2025 due to the warm weather,' she said. 'There's a good chance your Christmas tree could be carrying some unexpected passengers.' Despite the potential for more insects this year, there's no need to skip the real tree tradition, she explained. It only takes a few extra precautions to ensure your celebrations remain pest-free.