University of Michigan: Body measurements for all 11,000 bird species released in open-access database

University of Michigan: Body measurements for all 11,000 bird species released in open-access database. “For each individual bird, we measured nine ‘morphological’ traits, related to physical aspects of their bodies: four beak measurements, three wing measurements, tail length, and tarsus length (lower leg). AVONET also includes body mass and hand-wing index, which is calculated from three wing measurements to give an estimate of flight efficiency, and so the ability of a species to disperse or move across the landscape. The final version contains measurements from 90,020 individual birds at an average of around nine individuals per species.”