Flat blue and metallic blue butterflies – male or female?

There is more blue on a butterfly’s wings … does that mean it is a male or a female?

Palamedes Swallowtail Butterfly Less Blue = Male

Palamedes Swallowtail Butterfly
Less Blue = Male

Palamedes Swallowtail Butterfly More Blue = Female

Palamedes Swallowtail Butterfly
More Blue = Female

Palamedes Swallowtail Butterfly More Blue = Female

Palamedes Swallowtail Butterfly
More Blue = Female

Tiger Swallowtail Butterfly Less Blue = Male

Tiger Swallowtail Butterfly
Less Blue = Male

Tiger Swallowtail Butterfly More Blue = Female

Tiger Swallowtail Butterfly
More Blue = Female

Tiger Swallowtail Butterfly More Blue = Female

Tiger Swallowtail Butterfly
More Blue = Female

Spicebush Swallowtail Butterfly Less Blue (he is green) = Male

Spicebush Swallowtail Butterfly
Less Blue (he is green) = Male

Spicebush Swallowtail Butterfly More Blue = Female

Spicebush Swallowtail Butterfly
More Blue = Female

Black Swallowtail Butterfly Less Blue = Male

Black Swallowtail Butterfly
Less Blue = Male

Black Swallowtail Butterfly More Blue = Female

Black Swallowtail Butterfly
More Blue = Female

Pipevine Swallowtail Butterfly More Metallic Blue = Male

Pipevine Swallowtail Butterfly
More Metallic Blue = Male

Pipevine Swallowtail Butterfly Less Metallic Blue = Female

Pipevine Swallowtail Butterfly
Less Metallic Blue = Female

Ceraunus Blue Male Butterfly

Ceraunus Blue Butterfly
More Metallic Blue = Male

Ceraunus Blue Butterfly More Metallic Blue = Male

Ceraunus Blue Butterfly
Less Metallic Blue = Female

In the United States …

In general, if the butterfly has a flat blue color, such as in Black Swallowtail butterflies, females have more blue.

In general, if the butterfly has a metallic blue color, such as in Pipevine Swallowtail butterflies, males have more blue.

Take a look at these photos!

Comparisons must be done WITHIN the species.

Flat blue:

Females of some butterfly species, such as the Tiger, have a good bit of blue on their hind wings. Males have very little blue.

Females of other species, such as the Palamedes, have very little blue on their hindwings. Males have less or none.

Spicebush females are much like Tiger females. There is a good bit of blue on their hindwings. Most male Spicebush Swallowtail butterflies are more green than blue.

Metallic blue:

Pipevine Swallowtail males have a large patch of brilliant metallic blue on their hind wings. Female Pipevine Swallowtail butterflies have very little actual blue. Their hind wings are more of a metallic shiny black color.

Great Purple Hairstreak butterflies; males have more metallic blue and females have less metallic blue.

Many of the Hairstreak species are the same; males have more blue.

Remember – compare WITHIN the same species, not from species to species.

(Metallic blue isn’t color on the wings; it’s a refraction of light in a different manner than most blue colors. It’s an interesting online study. We encourage you to look up information about the blue that is in butterflies like the Blue Morpho and Pipevine butterflies!)

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