A bird has been found that uses the order in which notes are combined to express meaning. Toshitaka Suzuki of the Graduate University for Advanced Studies in Hayama, Japan, and colleagues played four notes, A, B, C and D, in different orders to the Japanese greater tit (Parus minor). ABC makes the bird scan horizontally for predators, repeated D’s attract the bird, ABC-D prompted both responses, but D-ABC was apparently uninteresting. This species normally uses more than 10 different notes, so this is just a start, but it’s the first evidence for "compositional syntax" in a wild animal.