Cuculi.

Cuckoos

Ruricolas agreste genus plerique cuculos
Cur vocitent, quaenam prodita causa fuit?[1]
Vere novo cantat Coccyx, quo tempore vites
Qui non absolvit iure notatur iners.
Fert ova in nidos alienos, qualiter ille
Cui thalamum prodit uxor adulterio.

Whatever explanation has been given for the custom of calling country-dwellers, that rustic race, ‘cuckoos’? - When spring is new, the cuckoo calls, and anyone who has not pruned his vines by this time is rightly blamed for being idle. The cuckoo desposits its eggs in other birds’ nests, like the man on whose account a wife betrays her marriage bed in adultery.