Hard objects or obstacles ... Discolored grass: A lawn with yellow or brown patches may be due to dull lawn mower blades ...

Objects and materials have different characteristics or properties. The properties of materials include features such as color, size, and shape; whether theyare rough or smooth, shiny or dull, hard or ...

The orbital ring is a dull yellow. Presently considered monotypic; however, there have been two subspecies described: americanus in eastern North America and occidentalis in the Southwest.