16 November - 22 November 2021

Dear fellow flock of birders,

When I went for my walk in the Arb this morning it was 17 degrees when I left the house but 21 degrees by the time I reached the Arb at 7:00am. Wow, what a heat wave! It was the coldest it had been in the Arb this fall but I was dressed for it.

Published: 11/24/2021

Note: Observations highlighted in this report are from November 14–November 18. To explore more recent observations, check out "The Leading Edge" section of the news update and explore our maps.

Heading Toward Overwintering Sites

Migratory activity remained steady in northern Mexico as more monarchs drew closer to overwintering sites within the Monarch Butterfly Biosphere Reserve.