Steve's Birds Dark Form Eastern Tiger Swallowtail, 7/15/13 Milford garden
Dark Form Eastern Tiger Swallowtail. Web the eastern tiger swallowtail is a large species with a wingspread range of 7.9 to 14.0 cm (approx. Web the dark female of this species would most likely be confused with the pipevine swallowtail, which also has only a single row of spots below but has very distinctive iridescent blue coloration on the hind wings;
Steve's Birds Dark Form Eastern Tiger Swallowtail, 7/15/13 Milford garden
Ventral hindwing with faint darker stripes. When the wings are opened they are yellow, also having four stripes black in color, mostly prominent in the males. The further south the more frequent. Web one example is the dark morph of the female eastern tiger swallowtail (papilio glaucus). 3.12 to 5.5 inches) (pyle 1981). Adults are yellow with four black bands on the front wings (figures 3 and 4). Web the dark female of this species would most likely be confused with the pipevine swallowtail, which also has only a single row of spots below but has very distinctive iridescent blue coloration on the hind wings; The black form of the eastern tiger swallow tail may be an example of deceptive coloration using mimicry. Females have a splash of iridescent blue wash on their tales, while males do not. There is an image on bugguide that also has two tails.
Adults are known to fly high above the ground, usually seen above the tree canopy. Web there are four distinct species which appear almost identical to each other: Web one example is the dark morph of the female eastern tiger swallowtail (papilio glaucus). Web a dark form looks similar to a pipevine swallowtail. Your location will influence how frequently you’ll see this dark form. Yellow wings with black stripes and borders; Hindwing with blue scaling and yellow marginal spots. There is an image on bugguide that also has two tails. The black form is called dimorphic coloration, which adds a level of protection by mimicking the distasteful pipevine swallowtail. Web the eastern tiger swallowtail is a large species with a wingspread range of 7.9 to 14.0 cm (approx. Web the black form the the eastern tiger swallowtail is most common in the southern part of its range in areas also inhabited by the pipevine swallowtail, a butterfly that has an unpleasant taste.
