Aplomado Falcons once ranged across the northern reaches of the Chihuahuan Desert in Mexico, but their numbers have sharply declined in recent years. Bird Conservancy is working with with local partners and agricultural producers to improve habitat and provide specially-designed nesting platforms, with promising results.
Rocky Mountain Bird Observatory biologists are back in Colorado after a fruitful winter studying grassland birds on their wintering grounds in northern Mexico. Before digging too deep into the data, biologist Erin Strasser offers a preliminary look at what they learned during season three of this study.
The Chihuahuan Desert grasslands of northern Mexico and the southwestern United States are the principal wintering grounds for 90% of grassland bird species breeding in the western Great Plains of North America. Species such as Baird’s Sparrows, Chestnut-collared Longspurs and Sprague’s Pipits, which rely on this region during the winter, have declined by upwards of 80% since the 1960s. Results from Rocky Mountain Bird Observatory and cooperators’ research, published in February in the journal Biological Conservation, shed light as to why these birds are declining and emphasize that unless immediate action is taken, forecasts are dire.