Question

Butterflies usually are identified by the colors and patterns on their wings. Butterflies have four wings: The two wings near the butterfly’s head are “forewings” while the wings near the butterfly’s tail are “hindwings.” You can use the following dichotomous key to identify four common butterfly species in North America.

Answer 1

B. Papilio polyxenes the wings are mostly black and are rounded

Answer 2

The shown butterfly in the diagram is - Papilio polyxenes.

Butterflies usually are identified by the colors and patterns on their wings. To identify an organism using a dichotomous key, compare the organism’s traits to the first pair of descriptive statements on the key.

• Follow the directions after each matching statement until you get to the organism’s identity.

The points on the hindwings identify the butterfly as

• a swallowtail butterfly is either Papilio glaucus or Papilio polyxenes.

1. Hindwings rounded ………………… Goto 3

2. Wings mainly yellow …………… Papilio glaucus

Wings mainly black ………….. Papilio polyxenes

3. Wings orange with black piping…Danaus plexippus

Wings yellow with black edges….. Colias philodice

• The wings are mainly black, so the butterfly is Papilio Polyxenes (common black swallowtail)

Thus, the shown butterfly in the diagram is - Papilio polyxenes.

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