{"fact":"While absolute brain size appears to be a predictor of motor self-regulation skill within bird species, relative brain size also holds significance as a predictive factor within birds.","context":"However, as among primates, absolute brain size does appear to be a significant predictor across bird species (figure 1), but on the other hand relative brain size is as well a significant predictor within birds.","source":"Can Kabadayi; Lucy A. Taylor; Auguste M. P. von Bayern; Mathias Osvath, Ravens, New Caledonian crows and jackdaws parallel great apes in motor self-regulation despite smaller brains, 10.1098/rsos.160104","index":174}