“Daddy long legs” is a common name used for three different things:
- Cellar spiders — these are true spiders. Females are larger and sometimes eat males.
- Harvestmen — these are arachnids, but not true spiders. Not typically cannibalistic.
- Crane flies — these are insects, not spiders at all. Known as "mosquito hawks".
The video shows "cellar spiders". Harvestman don't have webs or venom and only have one body part, spiders have two.
Harvestmen have one tiny round body with very long legs; true spiders have two main body sections.
mejer is Danish for a
harvestman / daddy longlegs of the order
Opiliones.
Harvestmen do have mouthparts, but they do not have venom glands and are not naturally cannibalistic unless severely stressed.
They use small mouthparts called chelicerae to grab and break up food, and
unlike spiders, many harvestmen can actually eat tiny solid bits of food instead of only liquefied meals.
They also do not have fangs in the spider sense, and they are not venomous to people. The old story that daddy long legs are “the most venomous spider but can’t bite you” is just a myth. Harvestmen are not true spiders and do not have venom glands at all.
Cellar spiders (Pholcidae) are true spiders with two-segmented bodies, silk, and venom, while harvestmen (Opiliones) are arachnids with one-segmented bodies, no venom, and no silk. Both are often called "daddy longlegs." Cellar spiders build messy webs in corners; harvestmen scavenge, are often found outdoors, and vibrate when threatened
I consider the Harvestman to be the true daddy longlegs
