**How to Spot Monarch Butterflies on Their Annual Migration.**
https://lifehacker.com/how-to-spot-monarch-butterflies-on-their-annual-migrati-1847959861
**Monarch Winter 2020–21 Population Numbers Released.**
https://arboretum.wisc.edu/news/arboretum-news/monarch-winter-2020-21-population-numbers-released/
https://www.ocregister.com/2021/11/21/metamorphosis-of-the-monarch/
(post is archived)