Complex sentence: A group of small juveniles will prevent a jumping spider or oecobiid from entering or leaving its nest, one of the juveniles will lunge and bite the victim, and sometimes others of the group join in feeding.
Split into simpler sentences: A group of small juveniles can prevent jumping spiders and oecobiids from entering or leaving its nest. One of the juveniles will lunge and bite the victim, and sometimes others of the group join in feeding.