Close up image of a Tiger Swallowtail
Hello, I’ve seen mentioned more than once in this site that your local Swallowtails are camera shy. This one certainly wasn’t. The image was taken in (northern)Illinois on a plant called Tithonia, aka "Mexican Sunflower" (though it is not a helianthus), an excellent beacon for butterflies, hummingbirds and the like. This image has been cropped, but the full-size image makes a wonderful background for a computer screen. Thank you for providing an informative site.
Regards,
Jeff

Hi Jeff,
Thank you for the wonderful photo of an Eastern Tiger Swallowtail, Papilio glaucus.

One Response to Eastern Tiger Swallowtail

  1. Cesar Crash says:

    This is P. glaucus to me.
    “The second diagnostic feature for canadensis is the width of the black band along the anal margin of the hindwing (Scriber 1982). For P. glaucus males, widths are in the range 10 to 50 percent of the width from wing margin to the CuA2 vein; whereas for P. canadensis males,
    the range is 50 to 90 percent (Scriber 1982, R. Hagen, unpubl. data). The width of the black band is greater in females than males, though the relative difference between species persists. ”
    I think we can tell this based on the underside view:
    http://butterfliesofamerica.com/papilio_g_glaucus_specimens.htm
    http://butterfliesofamerica.com/papilio_canadensis_specimens.htm

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