One of the first birds I saw when I arrived at Antelope Island State Park in Utah was the Chukars. They seem to be everywhere and they were making lots of noise. These birds are about 13 or 14 inches long so you would think they would be easy to photograph but they hide well in the grass and rocks.
It has been introduced widely as a game bird, and feral populations have become established in the United States Rocky Mountains, Great Basin, high desert areas of California, Canada, New Zealand and Hawaii. Initial introductions into the US were from the nominate populations collected from Afghanistan and Nepal.
The call is loud and includes loud repeated “Chuck” notes and sometimes duetting “Chuker” notes. Several calls varying with context have been noted. The commonest call is a “rallying call” which when played back elicits a response from birds and has been used in surveys, although the method is not very reliable. When disturbed, it prefers to run rather than fly, but if necessary it flies a short distance often down a slope on rounded wings, calling immediately after alighting. (Wikipedia)