Swarms of California oak moths are stretching along the thick stems of oak trees lining the edge of Mosswood Park in Oakland, weaving through the desolate branches, piling on the base of the tree, squeezing into the natural grooves of the oak, and resting on fallen leaves in the yellowed grass.

https://www.sfchronicle.com/bayarea/article/Thousands-of-oak-moths-swarm-Oakland-park-trees-12976473.php

Avid collectors quickly recognized that hilltops and ridges were often associated with high abundances of butterflies and, consequently, a good place to capture them for future display.

https://sciencetrends.com/hilltopping-behavior-in-tiger-moths/