The little lizards commonly seen scurrying around Victoria, BC, and the broader Capital Regional District are primarily Common Wall Lizards (Podarcis muralis). These small reptiles are not native to British Columbia but have established thriving populations in the region.
The Common Wall Lizard: An Introduced Species
Common Wall Lizards originated in Europe but have become a notable presence in Victoria and surrounding areas, particularly on Vancouver Island. Their introduction to the region can be traced back to a specific event in West Saanich, B.C., where they were first released from a small zoo. Beyond this initial release, it's also believed that other populations may have become established through escaped or intentionally released pets.
Once introduced, these adaptable lizards have shown a remarkable ability to spread. Observations from some populations in the USA indicate that their spread can occur at an approximate rate of 1 kilometer every 10 years, highlighting their capacity for territorial expansion.
Characteristics and Spread
Common Wall Lizards are typically slender, measuring up to 20 cm (8 inches) in total length, with long tails often twice the length of their bodies. Their coloration varies but commonly includes shades of brown, grey, or green, often with intricate patterns of spots, stripes, or reticulations that help them camouflage against walls, rocks, and groundcover. They are frequently observed basking in sunny spots or darting through gardens and along fences.
Here are some quick facts about these lizards:
| Feature | Description |
|---|---|
| Species Name | Common Wall Lizard (Podarcis muralis) |
| Native Range | Europe |
| Introduction in BC | First released in West Saanich from a small zoo |
| Spread Rate | Approximately 1 km every 10 years |
| Current Status | Established invasive species in the region |
Ecological Impact
While seemingly harmless, the Common Wall Lizard is considered an invasive species in British Columbia. Invasive species can pose significant threats to local ecosystems by competing with native wildlife for resources, altering habitats, or disrupting food webs. In Victoria, their presence raises concerns about potential impacts on native insect populations, which serve as food sources for local birds and other wildlife, and potential competition with native reptile and amphibian species.
For more information on the Common Wall Lizard and its presence in British Columbia, you can refer to resources from reputable environmental organizations and government bodies.
