Abstract
The oral aversion behaviour of the chicken (head shaking, beak wiping and tongue/beak movements) was measured following oral stimulation with 0.1 M quinine hydrochloride, 40% sucrose, 3 M sodium chloride, 5 M acetic acid and pure methyl anthranilate. Section of the lingual and laryngolingual nerves did not affect the oral aversion behaviour and therefore demonstrates the presence of functional extra-lingual chemoreceptors. The results are discussed in relation to previous anatomical findings.

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