Tern sea terns have light grey or white body plumage as adults, with a black cap to the head. The legs and bill are various combinations of red, orange, yellow, or black depending on species. The pale plumage is conspicuous from a distance at sea, and may attract other birds to a good feeding area for these fish-eating species. When seen against the sky, the white underparts also help to hide the hunting bird from its intended prey. The Inca tern has mainly dark plumage, and three species that mainly eat insects, the black tern, white-winged tern, and black-bellied tern, have
Numerology in other varieties of Chinese: Some "lucky number" combinations include: In South India, mostly Tamil Nadu, the numbers assigned to English alphabets are different. The list is shown below: There is no assignment for the number 9. Numerologists analyze double-digit numbers from 10 to 99. Fifth generation (5G), a.k.a. New Radio (NR), uses the term "numerology" to describe the combination of subcarrier spacing and symbol length. For example, in NR(5G) several different numerology (i.e., different subcarrier spacing and symbol length) are supported whearas in LTE there is only one numerology. Scientific theories are sometimes labeled "numerology" if their primary inspiration