"The frequency of monarchs passing through has increased over the last few days. We have been seeing 3-4 faded monarchs a day, mostly female. Most wings show wear and significant damage but the butterflies still seem to fly well. It really tugs at the heart knowing all that they have endured this year," said Chuck Patterson of Driftwood, Texas on April 2nd.

Comparing Years
This spring's migration is lagging a bit behind those of previous years. However, having the population concentrated in warm southern regions at this time can be a good thing:

• The eggs, larvae, and adult monarchs are safer from cold and freezing temperatures.
• The next generation can complete the life cycle more quickly where temperatures are warm.

Sanctuaries Empty
Estela reports that the last monarchs have left.

"The final leave occurred very clearly between Friday and Sunday (April 1-3). The forest is now deserted.  Only 48 hours earlier, monarchs were flying here and there. Now, nothing.

"Last week, I was honored to join the scientific team who came to collect mortality data from the devastating March storm."

• Read how the team collected mortality data...