211. Notes on the vocalizations of Mexican Jay (Aphelocoma ultramarina)

Vocabulary of the Mexican Jay is quite limited, the most common vocalization being an upslurred grating call note, repeated singly, doubled or in series. As comparison of voice between the different races basically boils down to putting this call note 'under the microscope', I have taken randomly some 5 recordings of the 3 groups: EAST group (couchii), WEST group (arizonae, wollweberi, (gracilis=no recordings)) and SOUTH group (colimae, ultramarinae).