“This year the American snout butterflies are making their way down to the Rio Grande River area in mass numbers,” Keck said. “Each year, these guys make their migration, but their numbers are directly correlated with rainfall and moisture.”
Rain fell at the right times this year to help the population. The rain increases the leaves on their host plant, the spiny hackberry.
American snout butterflies get their name from elongated mouthparts. They are small- to medium-size butterflies (much smaller than a monarch, also a bit smaller than a painted lady) and have orange and brown markings.
They blend in on bark and when flying can appear to be a leaf fluttering in the wind.