Audubon's Warbler -

In 1973, scientists discovered a "hybrid zone" in the Canadian Rockies where these two birds were meeting and having healthy, fertile offspring. This led to a dramatic scientific "lumping." They were stripped of their species status and merged into one: the —affectionately known by birders as the " butterbutt " for the bright yellow patch on its tail. 🧬 A Remarkable Survival Strategy

Look for a yellow throat, yellow crown, and yellow side patches. audubon's warbler

Recent genetic studies have revealed that the Audubon’s Warbler is actually a itself. It likely originated long ago from the mixing of the Myrtle Warbler and the Black-fronted Warbler. Because of this complex history, some scientists are now pushing to split them back into separate species again. In 1973, scientists discovered a "hybrid zone" in

For over a century, the Audubon's Warbler (of the West) and the (of the East) were thought to be two completely different species. Recent genetic studies have revealed that the Audubon’s

Watch how the Audubon’s subspecies behaves in the wild, showcasing its distinctive yellow markings and active foraging style: Yellow-rumped Warbler Hoosier Bird YouTube• Mar 19, 2026 🕊️ Quick Facts "Butterbutt" due to its yellow rump.

The story of the is a fascinating journey of identity, survival, and a "family reunion" that changed birdwatching history. The Mystery of the Two Warblers

Audubon's lived in the western mountains, while Myrtles dominated the eastern forests. 🤝 The Great Merge of 1973