The spider can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
While in contact with a web, the spider knows the exact location of any other creature in contact with the same web.
The spider ignores movement restrictions caused by webbing.
Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 1 piercing damage, and the target must succeed on a DC 9 Constitution saving throw or take 2 (1d4) poison damage.