Obs is a neighbourhood of narrow streets, terraced cottages and a Lower Main Road lined with restaurants and bars. Put two rivers, a hospital precinct and a lot of shared housing together and you get a steady diet of rat, cockroach and bed bug work.
Observatory: what drives crawling insects here
German cockroaches spread through the party walls of terraced cottages, so one house treated alone rarely stays clear. Fishmoths and ants are common in the older homes.
Rows of little Victorian cottages share walls, roof spaces and sometimes back lanes, so pests move from house to house without ever going outside. Plenty have been split into digs for students and hospital staff. Restaurants and bars on Lower Main Road have cellars, back kitchens and bins in tight yards. Old suspended floors, cracked air bricks and lean-to kitchens added later are typical weak spots.
The Liesbeek and Black rivers meet on the eastern edge of the suburb, with the old River Club land and the observatory grounds alongside. Devil's Peak and Groote Schuur estate rise to the west. Winter rain runs down from the mountain toward the rivers, and the low-lying streets near the water stay damp.
Rats are constant, particularly toward the river side and behind the Lower Main Road kitchens. German cockroaches move through shared kitchens and terraces. Bed bugs and fleas travel with tenants, and mosquitoes come off the rivers in late summer.
Something most people miss
The first thing a technician checks on a scorpion call is what is lying against the house. Rubble, firewood, stacked pots and loose paving are prime scorpion hiding spots, and moving them often makes the biggest difference.
People often try to spray scorpions with household insecticide and are surprised when nothing happens. Scorpions are tough against contact sprays, so a treatment plan has to focus on hiding places, entry points and their food.
How to tell you have a problem
- They turn up in shoes, towels or laundry left on the floor.
- Burrows with a crescent-shaped opening appear under rocks, at the base of walls or in sandy soil.
- There are lots of crickets, cockroaches or other insects around, which gives scorpions plenty to eat.
- A UV torch at night reveals scorpions glowing blue-green in the garden or along the walls.
- Scorpions are seen on walls, patios or in the garage at night.
- Scorpions are found in pool filters, sumps or under pot plants after rain.
What happens when we come out
Scorpions are harder to kill with contact sprays than most insects, so we focus on a combination of habitat reduction and targeted treatment. We apply a residual treatment to entry points, door thresholds, wall bases, airbricks and known hiding spots around the outside of the house. Because scorpions follow their food, we also treat for crickets, cockroaches and other insects that attract them. Where burrows are found, they can be treated directly. We pair this with practical advice on clearing debris and sealing gaps, which is often what makes the biggest difference.
Want the full step-by-step? See how our scorpion control service works.
Keeping them out afterwards
- Keep beds and cots away from walls and do not let bedding hang down to the floor.
- Wear gloves when gardening, moving stones or clearing debris.
- Use yellow or warm-coloured outside lights to attract fewer insects, which means fewer scorpions hunting them.
- Shake out shoes, boots and towels before using them, especially those left outside or on the floor.
- Move rubble, firewood, bricks and loose stones away from the walls of the house.
Pricing, honestly
The cost depends on the size of the property and garden, how much hiding space there is in rockeries and walls, and whether an insect treatment is needed to reduce their food. Properties on the edge of open veld or fynbos tend to have more ongoing pressure and may benefit from regular treatments. Follow-ups and any contract options are included in a free quote.
Clearing rubble, sealing gaps and using a UV torch to find scorpions at night can make a real difference without any chemicals. Sprays from the shop do little against scorpions because they are quite resistant to contact products. If you have small children or are finding thick-tailed scorpions, have a professional deal with it.
Questions we get asked in Observatory
Do Observatory rats come from the Black River and Liesbeek?
A lot of them do. The banks give them burrowing ground and water, and the old drain network links the river to homes, so blocking air bricks and drain gaps matters here.
Why do scorpions come indoors?
They come in hunting insects or looking for shelter, often after rain floods their burrows or on hot nights. Gaps under doors and around pipes make it easy for them.
Are scorpions in Cape Town dangerous?
Most are not, but thick-tailed Parabuthus species can deliver a serious sting. Treat any scorpion with a thick tail and slender pincers with caution.
Can you get rid of scorpions completely?
Not entirely, especially next to veld or fynbos, because they move in from surrounding land. We can greatly reduce how many come close to and into the house.
Do you come out to Observatory for scorpion control?
Yes. Observatory is part of our regular Southern Suburbs route, along with Mowbray, Salt River, Woodstock, Pinelands. Most bookings are done within about 48 hours, and after-hours visits can be arranged.
Can you treat a whole row of cottages in Obs at once?
Yes, and we recommend it when cockroaches or rats are moving through shared walls. Coordinated treatment stops them simply shifting next door.
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