Tuesday, August 21, 2012

Black Swallowtail Chrysalis

Black Swallowtail Chrysalis. Before forming this harder outer skin the caterpillar spins a safety line (top left) to hold it in place. They then shed off their outer layer of skin which you can still see here (middle right) somewhat still attached. Their skin then goes into a transformation taking on a wood-like texture to mimic a plant stem.

Black Swallowtails overwinter in the chrysalis stage and its around this time of the year that it becomes uncertain which chrysalises will hatch in a few days and which will wait until 6 to 8 months and hatch next spring.

1 comment:

  1. thanks for posting this. i have a couple of chrysalises in a tank that started their stringing up in the last week. a few are green and a few are over-wintered. i thought the over-wintered ones might be dead given their colour. i am happy to know that they aren't!