A huntsman moves across bark without an orb web stretched in front of it. It can be tempting to conclude that it has no use for silk. Hunting strategy and silk production are different questions: huntsman spiders actively catch prey, while silk remains important in their shelter and reproductive lives.
A body that fits the hiding place
Huntsman spiders belong to the family Sparassidae. The Field of Mars account describes flattened bodies and long legs directed sideways, helping them move quickly and fit into narrow spaces under bark or among rocks. A large leg span can make a spider look enormous without its body occupying the whole apparent area.
The Australian Museum records huntsmen in natural shelters as well as houses and cars. A wall sighting is therefore not the whole habitat story. Loose bark, logs, crevices and vegetation offer places that do not resemble the room where people most often notice them.
Do not peel away bark to find one. A hiding place is useful partly because it remains a hiding place, and removing it affects more than the one animal you hoped to photograph.
Hunting does not require a sticky net
Field of Mars describes stalking, chasing and grabbing prey, assisted by sensitive hairs that detect movement, vibration and air currents. Venom helps immobilise the captured animal. The Museum identifies insects and other invertebrates as food.
This differs from waiting for prey to strike a large capture web. It does not make a huntsman an insect: spiders have eight legs and two main body regions, with the legs attached to the front region and the silk-producing spinnerets on the rear abdomen. Nor does seeing one spider catch a cockroach establish how much pest control every huntsman provides in every house.
Observe a natural encounter if it occurs, without offering prey or repeatedly prodding the spider to make it move. A still spider may be sheltering rather than failing to hunt.
Silk can protect the next generation
The Museum describes females producing silk egg sacs and, in some species, guarding or carrying them. Its examples include a ground sheet of silk used during egg laying and silken retreats associated with laying or moulting. Those are useful jobs even though they are not an orb designed to intercept flying insects.
The details vary among huntsman species. Do not turn an example from one genus into a rule that every female builds an identical sac or that all huntsmen live in groups. A guarded egg sac also gives another reason to avoid disturbance; defensive behaviour around eggs is not an invitation to test the spider’s tolerance.
An empty skin is a different observation
Spiders moult as they grow. The Museum notes that a discarded huntsman skin can be mistaken for the spider itself. A pale, spider-shaped object left on bark or a wall might therefore record a moult rather than a dead animal or a second occupant.
Look without touching. If you cannot distinguish a shed skin from a living spider, keep the description tentative. Do not pull apart a retreat or egg sac to answer the question.
Keep your distance from an unidentified spider and avoid handling it. Outdoors, leave bark, logs and rock shelters intact. The next time you see silk beside a huntsman, ask what job that silk is doing before deciding that a hunter without a capture web has broken a rule.