twitter birds in different expression

pression may refer to:(in the vernacular) the act or particular way of expressing something (including an emotion through a facial expression or configuration)(in mathematics) a mathematical expression(in computing) a programming language expression(in computing) a vector graphics software Microsoft Expression(in genetics) the effect produced by a gene: gene expression(in grammar) a particular phrase or cliché, whose meaning may be interpretive or idiomatic.(in psychology) the act of expressing emotions.(in industry) obtaining liquids from raw materials through the application of physical pressure See more at Wikipedia.org...