LAWRENCE, Kan. It has been a hard winter for Monarch butterflies, according to Chip Taylor, director of Monarch Watch at the University of Kansas. Taylor said that low temperatures, storms and habitat destruction have all threatened the butterflies' overwintering population in Mexico.
"I spend a lot of time fretting over the status of the monarch population and I'm always searching for factors or data that will help me understand the past as a way of predicting the future trends in monarch numbers," Taylor said.
As the butterflies migrate through Texas and continue northward across the Great Plains this spring, Taylor has poured over data from a network of monarch observers, hoping to gauge the well-being of the butterflies. But he said it is difficult to pin down their numbers with precision.
"This returning population has been most unique," Taylor said. "The data clearly shows that monarchs were limited to Texas this spring more than in any of the previous ten years. What does this mean? Was the dispersal of monarchs limited this spring because of the lower than average temperatures or because the population is low or some combination of both? The answer is probably the latter a combination of low numbers of returning monarchs and lower temperatures."
Nonetheless, Taylor said that data on the butterflies "is not all doom and gloom."
"The conditions for growth in the monarch population in Texas have been exceptionally favorable the last two months," Taylor said. "The temperatures have been moderate and due to adequate soil moisture, the milkweeds and nectar sources have been abundant. In addition, the fire ants have been scarce having not recovered from the prolonged drought of last year. So, small population or not, the monarchs should be off to a good start."
The Monarch Watch director said that the health of butterfly population would be determined by the number of first-generation monarchs that come
|Contact: Brendan Lynch|
University of Kansas