Are Daddy Long Legs poison?
On the first, research has shown that daddy-long-legs venom is actually not exceptionally potent, even to insects. On the second, if it chooses to inject its venom into human skin it has the capacity to do so - a result that was famously demonstrated on an episode of Mythbusters in 2004.
If this ever happens to your furry friends, you don't need to worry – since they aren't poisonous to any mammal, daddy long legs are very unlikely to cause any adverse reactions to your pets.
The daddy longlegs is not harmful to humans, but they can kill redback spiders (Australian black widows). Because redback venom can kill humans, people may have believed daddy longlegs could kill us, too. Is it a myth that the daddy longlegs is the most poisonous spider on Earth? Yes, it is.
Myth: The daddy-longlegs has the world's most powerful venom, but fortunately its jaws (fangs) are so small that it can't bite you. Fact: That is a full-fledged Urban Legend, with no basis in fact whatever.
They have two body segments, a cephalothorax (fused head and body) and an abdomen. The daddy longlegs' waist is broad, leading one author to say it resembles a rice krispies on legs. They “hear” via vibrations. Their eyes are on short stalks that look like antennae (which arachnids don't have); their eyesight is poor.
Daddy long legs don't bite and they aren't poisonous. So they are completely harmless to cats and dogs if they eat them.
With a vacuum cleaner attachment, suck up spiders and their webs at wall corners, undersides of furniture, floors beneath appliances, crevices along the baseboards and around windows and curtains. Insects attract daddy long legs spiders so dust frequently and repair leaking pipes and faucets both inside and out.
Also, they also have been known to secrete an unpleasant scent to ward off predators. Daddy longlegs are more scared of you than you are of them! TRUE: Their mouths aren't big enough to bite humans.
The urban myth that daddy longlegs are venomous is just that - a myth! It's true that they cannot bite, but the venomous rumour is likely to have been due to its confusion with certain species of spiders.
He may have an upset stomach or not seem himself. If in doubt, take him to the vet to have him checked out. Dogs are pretty resilient and unless the spider bit him, he should be just fine. If he starts acting dizzy, disoriented, or having difficulty breathing, get him to a vet ASAP.