Basking Butterflies in Missouri
You can tell it's a cool morning. The monarchs are all holding their wings at the same angle, catching the rays of the sun. "The overnight low was 47°F," noted Tom Nagel, who took this picture early Wednesday morning. These monarchs must warm their muscles before they can continue their travels.
![Monarch Butterflies at roost site in Mexico.](https://s3.us-east-2.amazonaws.com/journeynorth.org/images/graphics/monarch/roost_mo_1316271524_04.jpg)
Photo: Tom Nagel
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