German professor Johann Friedrich Blumenbach (1752-1840), one of the founders of what is referred to as "scientific racism", devised the 5-color racial typology for humankind (e.g., black people, white people). From this source came the category of yellow or Mongoloid race, in which Oriental Asians are placed. More can be learned at this Wiki:
http://en.Wikipedia.org/wiki/Color_terminology_for_race#Western_classifications
______________________________________________
For the same reason White people are called White, Black people are called Black, Native Americans are called Red, and the Asians are called Yellow.
None of these are actually these colours.
The yellow accessory pigments found in leaves are called carotenoids. They help plants capture light energy for photosynthesis and also contribute to the yellow, orange, and red colors of leaves in the fall.
Bilirubin
Limonite is a natural iron ore. Limonite can be found in various shades of brown, yellow, orange and combinations of the three.
Green,brown, and somtimes yellow ~EDIT~ They can be many different shades of brown, green, and yellow. Very rarely, an inky blue grasshopper can be found, though.
The small brown long bug commonly found in gardens and fields is called a centipede.
Sandstone can be in any color, but is mostly found in tan, brown, yellow, red, gray, and white.dunno probz brown or orange x
The mineral you are referring to is likely Siderite, which is a type of ferrous carbonate commonly found in brown, black, or yellow colors. Siderite is known for its iron content and is often found in sedimentary rocks and hydrothermal veins.
A Lincolns Sparrow is dark brown with a long yellow pointy beak and larger than a normal Sparrow. It is also found in the north near New York.
Kissing bugs can be found in Canada and the continental United States. They have the colors of black or brown with yellow, brown or red marks on their abdomen.
The small flat round brown bug commonly found in homes and gardens is called a "cockroach."
The bird you are likely referring to is the Brown Thrasher. This medium-sized songbird has a brown, streaked body and a distinctive yellow eye and beak. It is known for its melodic songs and can often be found in shrubby areas and gardens throughout Kentucky. Another possibility is the Common Yellowthroat, which also has a yellow beak but is more vibrant with its yellow and olive coloration.
They range from red to brown and black. Rarely green or yellow