endocast (IMAGE) Flinders University Caption Digitally reconstructed skull and endocast of a Collared Sparrowhawk (Accipiter cirrocephalus; left) and the brain of a Cooper's hawk (Astur cooperii; right) showing the similarities between endocasts and brains of two related species. Credit CC-BY Aubrey Keirnan (skull) Andrew Iwaniuk (brain) Usage Restrictions use with this release License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.