Quiscalus palustris
The Slender-billed Grackle (Quiscalus palustris) was a striking, medium-sized passerine, endemic to the extensive marshlands of the Lerma Valley in central Mexico, tragically now extinct. Adult birds presented a lustrous, iridescent black plumage, with males typically displaying a more intense purplish-blue sheen on the head, back, and breast, transitioning to a greenish gloss on the wings and long, graduated tail, and possessing bright pale yellow eyes. Females were generally similar but sli...
Historically, the Slender-billed Grackle inhabited vast freshwater marshes, reed beds, and tulares within the Lerma Valley and adjacent lagoons in the high plateau of central Mexico, primarily at elevations around 2,500-2,600 meters (8,200-8,500 feet).
Its diet consisted primarily of aquatic insects, larvae, small fish, and likely some plant matter such as seeds and grains, foraged by probing in mud and shallow water.
Observations of the Slender-billed Grackle's behavior are limited due to its early extinction, but inferences can be made from historical accounts and its extant relatives. These grackles were likely diurnal, spending their days foraging within the dense marsh vegetation and open water. They were...
Historically, the Slender-billed Grackle had an incredibly restricted and highly localized range, being strictly endemic to the Lerma Marshes and adjacent lagoons within the Lerma Valley of the State of Mexico, in central Mexico. This unique high-altitude wetland system, located on the Trans-Mexi...
Extinct
- The Slender-billed Grackle was one of North America's most geographically restricted bird species, endemic solely to the Lerma Marshes in Mexico. - It was declared extinct by the IUCN in 1994, with the last confirmed sighting occurring in 1910. - Its extinction was primarily caused by the syste...