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. A single American Tree Sparrow was seen only once, and this was in an area dominated by fourwing saltbush and desert saltgrass. A large and yet relatively open stand of salt-cedar was also within just a short distance. Common associates are western hemlock, western redcedar, true firs, redwood, ponderosa pine, and larch.