Historians point out that the Celts who live on the shore of the Ocean honor the Dioscori above other gods. For there is an ancient tradition among them that these gods came to them from the Ocean.
Eudoxus of Rhodes [late third-century BC] (via Aelian On Animals 17.19):
Eudoxus says that the Celts do the following (and if anyone thinks his account credible, let him believe it; if not, let him ignore it). When clouds of locusts invade their country and damage the crops, the Celts evoke certain prayers and offer sacrifices which charm birds-and the birds hear these prayers, come in flocks, and destroy the locusts. If however one of them should capture one of these birds, his punishment according to the laws of the country is death. If he is pardoned and released, this throws the birds into a rage, and to revenge the captured bird they do not respond if they are called on again.