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
Versatile foragers—they catch insects mid-air like flycatchers or eat suet and berries. audubon's warbler
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 In 1973, scientists discovered a "hybrid zone" in
