As you read this week's report, think about the challenge question below.
Many people mention the condition of the butterfly's wings in their report.
We caught, marked, and released 9 monarchs. Since then, we have marked the population daily, and to date have marked about 70 individuals. We will be able to estimate the population size and migration through the area from our data. I have an uneasy feeling that they may be leaving Mexico earlier than usual, possibly due to thinning of the trees in and around the overwintering sites. We will continue monitoring the population to see if it produces a second generation.