The song of the Blackpoll Warbler will put your hearing to the test. Most birds sing at a frequency between 1,000 Hz and 8,000 Hz, but the Blackpoll’s song can reach 10,000 Hz, even higher than the song of a Brown Creeper.

Blackpoll Warblers are long-distance athletes and they hold the record for the longest overwater flight for a songbird. During the fall, these half-ounce warblers fly nonstop for up to 3 days, covering on average over 1,800 miles over the Atlantic Ocean to reach their wintering grounds in Puerto Rico, the Lesser Antilles, and northern South America. Such a journey requires that they eat enough before they leave to double their body mass.

https://www.allaboutbirds.org/guide/Blackpoll_Warbler/overview