Bird Conservancy is finishing up another winter of grassland bird monitoring in Mexico, using radio-telemetry to study survival rates of Baird’s and Grasshopper Sparrows. We follow them to get an inside view into their lives, and sometimes feel a bit like sparrow paparazzi!
This photo journal highlights the most recent winter field season monitoring grassland birds in the Chihuahuan Desert in Mexico. Teaching telemetry, radio tracking Grasshopper Sparrows and assessing predation/mortality rates are all a major part of this program.
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.
Biologists studying overwinter survival rates of sparrows in the Chihuahuan Desert grasslands of northern Mexico are turning their attention to Loggerhead Shrikes. Taking advantage of shrub encroachment and the favorable habitat it provides for them, shrikes have become an apex predator of birds and many other animals on the landscape.
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.
Rocky Mountain Bird Observatory’s third season of studying survival and habitat use of Baird’s and Grasshopper Sparrows is under way on their wintering grounds in the grasslands of northern Mexico. Writing from Chihuahua, biologist Erin Strasser shares an update on capturing and tracking sparrows, insights gained so far this season and captivating photos from the field.
Spring migration is under way. Just as the birds return north, so do the RMBO scientists who study them on their wintering grounds. Back home in Colorado, biologist Erin Strasser offers preliminary results from a second season studying winter survival and habitat use of Baird’s and Grasshopper Sparrows in the Chihuahuan Desert grasslands.
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.
The field season is under way in northern Mexico, where RMBO and partners are studying the winter survival and habitat use of Baird’s and Grasshopper Sparrows in the Chihuahuan Desert grasslands. Writing from Chihuahua, biologist Erin Strasser provides an update on capturing and tracking sparrows, insights gained so far this season and stunning photos from the field.