yellow sac spider cheiracanthium on pine needles.

animal arachnid arachnophobia arthropod biology brown bug cheiracanthium close closeup color creature creepy dangerous detail ecology ecosystem environment fangs fauna foliage front view garden pests horizontal insect invertebrate macro macro nature natural habitat people one outdoors pest control pine needles poison poisonous scary spider spiders spring springtime usa venom venomous wild wildlife yellow sac zoology texas houston