Rodent lice are tiny, parasitic insects that live on the fur of various rodents. While different species of rodent lice exist, a common type found on rats, for instance, exhibits distinct characteristics that make it identifiable.
Specifically, a widely known rodent louse, Polyplax spinulosa, which commonly infests both laboratory and wild rats, offers a clear example of their appearance.
Key Characteristics of Rodent Lice
Polyplax spinulosa provides a good illustration of what rodent lice generally look like:
- Size: These lice are very small, typically ranging from 0.6 to 1.5 millimeters in length. This makes them difficult to spot without close inspection.
- Color: They are usually slender and yellow-brown, often with a noticeable brown tinge. Their coloration helps them blend into the fur of their host.
- Body Shape: They possess a slender body adapted for moving through dense fur.
- Head: The head is rounded, and a key feature for identification includes two five-segmented antennae protruding from the head.
Where to Find Them
Rodent lice, like Polyplax spinulosa, are typically found directly on their host. They prefer areas where they can easily feed and remain protected within the fur. Common locations on a rodent's body include the:
- Midbody fur
- Shoulders
- Neck
Summary of Appearance
For a quick overview, here's a summary of the common characteristics of a rodent louse like Polyplax spinulosa:
| Characteristic | Description |
|---|---|
| Size | 0.6 to 1.5 mm long |
| Color | Slender, yellow-brown with a brown tinge |
| Body Shape | Slender |
| Head | Rounded |
| Antennae | Two, five-segmented |
| Habitat | On rodent fur (midbody, shoulders, neck) |
Understanding these visual cues can help in identifying the presence of lice on rodents.
