This report describes an acute poisoning event observed in captive her
ring gull (Larus argentatus) chicks fed a batch of store-bought scallo
ps. They developed a characteristic acute syndrome, that has not hithe
rto been reported in birds and the cause of which remains to be identi
fied. We suggest that it is a variant of paralytic shellfish poisoning
(PSP) insofar as it was paralytic and caused by shellfish. However, a
nalyses by the U.S. Food and Drug Administration to identify known tox
ins (saxitoxins, brevetoxins, domoic acid) in the scallops were negati
ve. (C) 1998 Elsevier Science Ltd. All rights reserved.