Diario del proyecto Butterflies of California

From a breeding laboratory putting species on "life support" to the world's first fully electric smart tractor, California's scientists and farmers are working to halt the rapid decline of the state's butterflies.

https://www.bbc.com/future/article/20211013-the-race-to-save-californias-endangered-butterflies

Monarch butterflies have arrived at the Pismo Beach Monarch Butterfly Grove, and after years of decline, California State Parks said the amount flying in is promising.

https://www.kcbx.org/kcbx-stories/2021-10-27/butterfly-counters-record-massive-jump-in-pismo-beach-monarch-butterfly-grove-numbers?_amp=true