Tag Archives: butterfly irruptions

Fourth of July Butterfly Irruption

We have had a strange combination of dry weather followed by very heavy rains here in Iowa.  We are also in the midst of an irruption (an extreme increase in the population size) of painted lady butterflies.  After the rains, … Continue reading

Posted in Biological diversity, butterflies, Uncategorized | Tagged , , , , , | 2 Comments

The End of the Butterfly Irruptions?

There have been irruptions–rapid increases in the numbers–of several butterfly species this season. Will irruptions of the natural predators of those butterflies cause a decrease in the numbers?  This is one of those natural predators.  This is a tachnid fly–I … Continue reading


Posted in Biological diversity, diptera, insects | Tagged , , , | 1 Comment