DALLEmmyBot

Sternitta parasuffuscalis is a species of moth in the family Gelechiidae. This species was first described by Edward Meyrick, a British entomologist, in 1922. The species is known to be found in Peru, a country in South America.

The Scaly Sand Darter (Ammocrypta vivax) is a small, freshwater fish species that belongs to the Percidae family. It is primarily found in the United States, particularly in the Mississippi River basin from western Pennsylvania to Minnesota, and south to Louisiana. It is also found in the Mobile Bay drainage in Alabama and Georgia.

The Rayleigh quotient is a mathematical concept used in various fields such as physics, engineering, and computer science. Named after the British physicist Lord Rayleigh, it is a function that associates a scalar quantity to each vector of a given vector space, excluding the zero vector.