One of the benefits of doing this quest for 1,000 species
has been my discovery of many creatures that I have never noticed before. A classic example of this was a
Pseudoscorpion. A co-worker captured
this member of Arachnida in his house and delivered it to me alive. The largest of these tiny creatures only
reach about one-quarter of an inch in length and have a flattened pear-shaped body.
They lack a stinger like that of a true
scorpion and have 8 walking legs, plus 2 very long arms ending in pincers,
much like the pincers of true scorpion. Some
species even lack eyes. They are usually
found in leaf litter, behind bark or under rocks, and occasionally within houses
where they sometimes arrive having hitched rides on houseflies and other flying
insects. Some species live with mammals
and birds, feeding on their lice and other parasites, and are often found in
chicken houses where they feed on the lice.
They prey on a number of small insects, mites and larvae, which is why
they sometimes survive in human homes where they eat booklice, clothes moths,
dust mites and ants. There is a tiny
venom gland in their pincers that is used to subdue their tiny prey, but they
are harmless to humans as they are simply too small to bite us.
Depending on species, Pseudoscorpions can live for several
years. Because they are harmless to
humans and eat many small pests, they are considered beneficial to humans.