It’s believed millions of the orange and black creatures are making their way from the US to Mexico, where they will stay for the winter.

Extreme weather was said to have made the Monarch's summer difficult. Drought and a cold winter severely limited the insect’s primary food source, milkweed.

It’s been a big year for bugs and radar.

New Mexico grasshoppers and mayflies in Wisconsin have also been seen. The frequent sightings has led to "aeroecology." That’s the terminology being used to follow the movement of bats, birds, and other winged critters.

More here.