Previously in the Ultimate Guide to Carpenter Ant Removal we learned how to identify carpenter ants and why we get them, now let’s take a look at the reasons why we get carpenter ants in British Columbia specifically. Remember, carpenter ants are tricky to control, so if you’re unsure what to do give us a call and one our ant control technicians will help you out.
TLDR;
- The large black carpenter ant is the one most homeowners notice, often seen indoors searching for food
- Some species prefer damp, decaying wood, while others will move into dry, sound wood once a colony grows
- Colour alone isn’t enough for identification, size, behaviour, and nesting location give better clues
- Carpenter ants often start outdoors in tree stumps, logs, or woodpiles before expanding into homes
- Indoor sightings usually mean there’s a nearby nest or a satellite colony already established
- Proper identification helps guide treatment, since different species may favour different nesting conditions
- Early detection and moisture control go a long way in preventing carpenter ants from settling into your home
Or Summarise this article with.
Carpenter Ants in BC
BC is home to 10 species of Carpenter Ant but it’s the Camponotus modoc and Camponotus vicinus which are most commonly found in homes. These structural pests are large, about 6-12 mm in length and typically appear in homes that have experienced moisture issues.
The all-black Camponotus modoc, and the reddish-brown and black Camponotus vicinus are ones to watch out for, as they can cause the most problems.
Carpenter ants are serious structural pests in some parts of BC, however, ants are central to ecosystem function, and in many ecosystems they are keystone species, i.e., their removal from the ecosystem would significantly alter its function, with many other organisms impacted negatively.
Ants perform numerous important ecological functions. Their occurrence as staple food for many birds and ants are also an important dietary component for bears. One study found that “The ant season was found to occur from mid-June to mid- to late July, when berries began to ripen. Ants and ant larvae were the main food items observed to be eaten by bears during this season. Bears searched for ants in old logs and under stones.” Grizzly bears in the Prince George area feed on ants when succulent herbal growth becomes sparse, and berries are not available, in late summer.
Carpenter ants are among the dominant ants in sub-boreal forests, where they are perhaps the most important organisms in physically breaking down wood. In the Prince George area, Camponotus herculeanus dominates in most forest types, while we have found C. modoc in a dry Douglas-fir stand on a south-facing slope. C. vicinus was also found on this slope, but this species nests under rocks.
Ants in the genera Formica and Camponotus are commonly seen carrying prey. Species in both of these genera can have huge nests, containing tens of thousands of workers, so it is conceivable that they have significant impact on forest health by preying on the caterpillars of important defoliators, at least locally.
Carpenter Ants Vancouver
If you’re dealing with carpenter ants in Vancouver, you’re usually looking at a mix of species, but the big ones get all the attention. The large black carpenter ant is the most common troublemaker in homes across the Lower Mainland.
They love damp wood, especially around windows, roofs, and decks. With Vancouver’s rainy climate, that gives them plenty of opportunities to move in. If you’re spotting them indoors, it’s rarely random. There’s almost always a nest nearby or already inside.
Big Black Ants Are Carpenter Ants… Or Are They? 👀
A lot of people assume any big black ant is a carpenter ant. Fair guess, but not always right.
Carpenter ants are usually larger and have a smooth, rounded thorax when viewed from the side. They also move with purpose, often following defined trails. Other large ants might wander more randomly and won’t cause structural damage.
If you’re seeing consistent activity in the same areas, especially near wood, there’s a good chance you’re dealing with carpenter ants.
Why They Like Rotten Wood
Once upon a time, back in the dawn of prehistory, carpenter ants foraged in the dense forests of BC, and all was well. They helped to keep down the population of other insects, and performed a vital role in the ecosystem by hastening the decay of rotten wood. As a native species, they’ve been here for millions of years, doing what they do year after year.
But this fragile peace was not to last. Eventually, humans began to build homes on land that used to be forest. So from a carpenter ant’s perspective, we’re the ones who are invading. Still, that won’t be much consolation when these big black ants show up in your house and start chewing through the wooden structure that supports it.
Ants of British Columbia
Knowledge of the ants of British Columbia is poor at best. Using published information, existing collections, and personal collections, Naumann et al. (1999) list 92 species known or expected to occur in British Columbia. This number is lower than lists from areas in the United States in spite of the fact that the diversity of habitats found in British Columbia is very high, and one could expect a correspondingly high diversity of ants.
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Ants of Central Interior British Columbia
The insect fauna of Central Interior and Northern British Columbia is very poorly known. It is not surprising then, that very little is known about the ants of this region. Very few collections of ants have been made north of the Chilcotin, so it is difficult to estimate the number of ant species present in this region. Based on collections, one study estimated a minimum of 25 species of ants in the Yukon. Similar numbers are likely in the Central Interior of British Columbia. To date, we have found 23 species in three subfamilies near Prince George, and an additional number of species near Houston, BC, and Williams Lake, BC.
Ants utilizing dead wood
Many ants utilize dead wood for nest construction. The most well-known of these are the carpenter ants, Camponotus spp. These large, but often shy and non-aggressive ants construct their nests in decayed logs or standing trees, including heart-rotted live trees. Many other ants also utilize wood, e.g., species in the genus Formica often nest in stumps or coarse woody debris.
-Thanks to Klinkenberg, Brian. (Editor). E-Fauna BC for sharing his information on this subject matter.
Electronic Atlas of the Fauna of British Columbia [www.efauna.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Date Accessed]
Learn about carpenter ant control and removal
The Ultimate Guide to Carpenter Ant Removal is a collection of helpful resources for homeowners to educate themselves on everything carpenter ant related. Read more of our resources and tips for managing carpenter ant problems at home.
–> Next up, learn how to spot carpenter ants at home
Westside Pest Control is the no1. Ant Control company in the lower mainland. In addition to carpenter ants, we also treat for Fire Ants and Pavement Ants. If there is a need for professional help with an infestation contact of of the team today on 604-924-6741, we would be happy to help.
FAQs
Are carpenter ants common in Vancouver homes?
Very common. The damp climate creates ideal conditions for them, especially in older homes or places with moisture issues. They often start outside in trees or woodpiles, then expand indoors. If you’re seeing them inside regularly, there’s usually a nest nearby and it’s worth taking a closer look.
Do all carpenter ants damage wood the same way?
Most carpenter ant species hollow out wood to build galleries, but how aggressive they are can vary. Some stick to damp or decaying wood, while others move into dry wood as the colony grows. Either way, once they’re established, they don’t stop expanding unless treated.
Should I worry if I only see one or two large ants?
Even a couple of sightings can mean more are hiding out of view. Carpenter ants send workers out to forage, so what you see is only a small part of the colony. If those sightings repeat over a few days, it’s time to start investigating where they’re coming from.
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