WildSnapField Guide
Insects

Eastern Tailed-Blue

Cupido comyntas

Photograph of Eastern Tailed-Blue (Cupido comyntas)
Photo: (c) jenniferf4, some rights reserved (CC BY-NC), uploaded by jenniferf4 (CC-BY-NC) · source

What it is

The eastern tailed-blue or eastern tailed blue (Cupido comyntas), also known as Everes comyntas, is a common butterfly of eastern North America. It is a medium-sized butterfly that is distinguished from other blues in its range by the small thin tail.

Where and when to find it

Habitat
Very common and found across almost all of the United States. They love open sunny areas like meadows, fields, gardens, and roadsides.
How to find it
Look for them fluttering low over clover and other small flowers in sunny spots. They are small and quick, so watch carefully!
Best time of day
Daytime, especially sunny mornings and afternoons; spring to fall.

How it lives

What it eats
Nectar from flowers as an adult. Caterpillars eat clover and other legume plants.
What eats it
Birds, spiders, predatory insects.

Worth knowing

  • The 'tail' on their wings is meant to trick predators into attacking the wrong part of their body.
  • Males are usually more brightly blue than females.
  • They often land with their wings folded upwards.
  • Their caterpillars are sometimes tended by ants, which protect them from predators.
  • They are one of the most common butterflies you might see in your garden.
  • The blue color on their wings is made by tiny scales that reflect light!

Why it matters

Eastern Tailed-Blues pollinate flowers as they drink nectar. Their caterpillars are food for some birds and insects.

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