What is a Yellowish White Caterpillar with Black Spikes?
The caterpillar that precisely fits the description of being yellowish-white with distinctive black structures often referred to as "spikes" is the Dagger moth caterpillar, particularly species such as the American Dagger Moth caterpillar.
Characteristics of the Dagger Moth Caterpillar
These caterpillars are easily recognized by their unique combination of coloration and prominent bristly structures.
Dagger moth caterpillars typically present a fuzzy appearance, covered in medium-length hairs, known as setae. These setae can range in color from bright yellow or yellow-green to white, giving the caterpillar its characteristic yellowish-white hue.
What might be perceived as "black spikes" are actually elegant, slender bundles of black bristles, scientifically referred to as "pencils of setae." These prominent structures are key identifying features:
- Four of these black "pencils" extend outward from specific locations: two from the first abdominal segment and two from the third abdominal segment.
- An additional fifth "pencil" or bundle of black bristles is situated near the rear end of the caterpillar.
These distinct bristle arrangements are crucial for identifying the dagger moth caterpillar, differentiating it from other species. While they might appear spiky, these are bundles of hair rather than rigid spines. For more general information on this species, you can refer to resources like the American Dagger Moth Caterpillar.
Quick Identification Guide
For a concise overview, here are the primary visual characteristics:
| Feature | Description |
|---|---|
| Body Color | Yellowish-white, yellow, or yellow-green |
| Texture | Fuzzy, covered in medium-length setae (hairs) |
| "Spikes" (Bristles) | Five distinct bundles of black bristles (pencils of setae) |
| Bristle Locations | Four extend from the first and third abdominal segments; one from the rear |
