Many accounts are incomplete although new information is being added continuously.
Errors do occur.
Users are cautioned to refer back to the original cited source to assess completeness and correctness before using the information. Web updates are intermittent, not continuous, therefore some dynamic information such as legal status may not be absolutely current. The Mexican chickadees are permanent residents and they breed at the Gray Ranch, Hidalgo county, New Mexico. Mexican chickadees inhabit woodlands and adjacent forests and chaparral. American Ornithology Union.