This is my first year raising BSTs and I have 9 chrysalises. 2 are green and 7 are brown.
I read in here that the brown chrysalides meen the BST had gone into diapause.
I was tending to my monarchs late this afternoon when I looked into my plastic aquarium with 3 brown chrysalides...and saw 2 butterflies!!!
All my caterpillars are in an enclosed porch that gets some afternoon sun (windows are always open). Maybe the combination of being in a warm porch and a plastic aquarium brought them out of diapause? tomorrow is going to be even warmer and all of the cats pupated around the same time.
This got me thinking, what is the lifespan of the BST adult? will they migrate to warmer weather or just die when it gets too cold here? Thanks in advance, Tony