Close view of three neotropic cormorants gular fluttering to cool off

neotropic cormorant phalacrocorax brasilianus bird olivaceous cormorant cormorant flutter gular neck muscle vibrate shake beak open cool cold heat body temperature temperature hot sing ornithology birdwatching bird watching watch behavior behaviour wild wildlife wild life wilderness group flock flight gulp sunning animal three grass reed tall america depth of field dof south america nobody no people black brown dark