Where’s Wildlife · Butterfly Field Guide

Eastern Tailed-blue

Cupido comyntas

Pronounced (approx.): KYOO-pih-doh koh-MIN-tass

A tiny butterfly of sunny fields and yards, best recognized by its delicate hindwing tails.

Select the photograph to browse all four field photographs.

NATIVE TO NORTH AMERICA

At a Glance

Family
Lycaenidae · gossamer-winged butterflies
Habitat
Prairies, fields, roadsides, and sunny yards [1]
Host Plants
Clovers, alfalfa, vetches, and other pea-family plants — caterpillar food [1]
Adult food
Nectar, especially from low flowers with short tubes [1]
Quick ID
Fine hindwing tails beside small orange spots [1]

Identification

Above: Males are blue; females vary from blue to dark gray. [1]

Below: Pale gray wings carry small dark spots and orange marks beside the tails. [1]

Similar species: Azures lack hindwing tails. Check the orange spots too, because tails may be difficult to see. [1]

Field Photographs

Explore these four field photographs. Select any image to open the gallery.

Life Cycle & Host Plants

Eggs are laid singly on host plants. Caterpillars eat flowers, seeds, and sometimes leaves. Mature caterpillars overwinter in seedpods and pupate in spring. [1]

Small Tails, Useful Disguise

The fine tails resemble antennae and may direct a predator’s attack toward the hindwing instead of the head. Watch for adults flying close to the ground. [1]

Range & Sightings

Explore reported Eastern Tailed-blue sightings. Observation records show where people have documented butterflies and are not a complete range map.

Keep Learning

Sources & further reading

[1] Missouri Department of Conservation — Eastern Tailed-blue
Identification, habitat, host plants, feeding, and overwintering biology.

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