09/10/2026
Wild Wednesday - September 9 - Butterfly Bed & Breakfast
A few days ago, as we walked through a nature preserve on an early morning hike, we counted 20 monarch butterflies in a quarter mile of open trail. The monarch migration is here, and they are enjoying the boneset (flat white flowers).
The orange and black monarchs are joined by the yellow and black tiger swallowtails. How many of each can you find in the picture? (answer below)
The Wild Wednesday for September 10, 2025 was at this same preserve and same type of flower but bumblebees sleeping on the flowers.
In this case, the monarch butterflies are not sleeping on the flowers. On their journey south, they gather in trees for the night. A roost of butterflies clustered together helps them keep warm overnight. They need temperatures about 55F to fly, but they can withstand cooler temperatures overnight. As the sun warms them, they become more active. These were getting nectar from the boneset before continuing on their journey to Mexico. Such nectar plants are important for fueling their journey.
Note that tiger swallowtails do not migrate. They live their entire lives in a relatively small area. Monarchs developing early in the spring and summer often fly north or stay local to where their eggs are laid.
But monarchs in the migrating generation will fly south to Mexico, spend the winter there in roosts, and then migrate partially north to Texas and other southern states. There is a west coast population that flies south to California rather than Mexico.
In 2025, scientists put over 400 tiny solar-powered tags (BluMorpho) on monarchs to track their movements. See the link in the comments.
Have you seen any monarchs? Were they eating nectar or flying? Were they flying roughly in the direction of Mexico? Which way is Mexico from where you are? Could you make plans to plant native nectar plants to help the butterflies and other insects have food?
Answer about picture: three monarchs (one left, two upper right with closed lighter-colored wings) and three yellow tiger swallowtails