In this article there are given some data about a brief observation of studying lexical system of the Uzbek language, the names of scientists, whose efforts have helped arouse opportunities of the language.This article thoroughly highlights several studies done in the field of lexical system, especially semantic features of terms relating to food, clothes and architecture. The author of this article states that ornithological terms which are considered as a part of zoonims, can be the subject of special investigation for linguists. And also author studied the some birds’ names are not included in literary language or their literary norms are not assigned clearly for not having been studied thoroughly.