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What is an orange caterpillar with black spikes?

Published in Caterpillar Identification 2 mins read

An orange caterpillar with black spikes is typically a Woolly Bear or Tussock Moth caterpillar.

Identifying Orange Caterpillars with Black Spikes

These distinctive caterpillars are known for their striking appearance, featuring orange bodies covered with noticeable black spines or fur tufts. While they share this common visual trait, they belong to different moth families.

Woolly Bear Caterpillars

  • Appearance: Woolly bears, specifically the Banded Woolly Bear (Pyrrharctia isabella), are well-known for their dense coats of stiff bristles. When seen as an "orange caterpillar with black spikes," it refers to their characteristic segments of black fur often intermingled with reddish-brown or orange bands. They feature noticeable black spines or fur tufts on their bodies.
  • Commonality: These caterpillars are a common sight across North America and are often associated with autumn folklore regarding winter predictions.

Tussock Moth Caterpillars

  • Appearance: Tussock moth caterpillars (from the family Erebidae, subfamily Lymantriinae) also exhibit orange bodies with prominent black spikes or tufts of hair. Their spiky appearance often includes distinctive "hair pencils" or brush-like tufts at the front and rear, along with shorter, dense hairs along their bodies. They feature noticeable black spines or fur tufts on their bodies.
  • Diversity: There are various species of tussock moths, and many larvae possess these orange and black spiky characteristics.

Common Characteristics

Both Woolly Bear and Tussock Moth caterpillars exhibit similar physical attributes that match the description:

  • Body Color: Primarily orange or reddish-brown.
  • Spikes/Tufts: Covered in black spines, bristles, or fur tufts, giving them a spiky appearance.

Here's a quick overview:

Caterpillar Type Body Color Spike/Hair Color Noteworthy Features
Woolly Bear Caterpillar Orange Black Dense, bristly fur often in bands
Tussock Moth Caterpillar Orange Black Distinctive tufts and hair pencils

Habitat and Presence

These caterpillars can commonly be found on various plants and trees in gardens, fields, and wooded areas. They are typically herbivores, feeding on the leaves of a wide range of host plants.

  • Typical Locations:
    • Garden plants
    • Shrubs
    • Trees (deciduous and coniferous)
    • Weeds and wildflowers

For more information on Woolly Bear Caterpillars, you can visit National Wildlife Federation. To learn more about Tussock Moth Caterpillars, refer to resources like University of Kentucky Entomology.