Hübner's pero

''Pero ancetaria'', Hübner's pero, is a moth of the family Geometridae. It is found in the eastern part of the United States, Ontario and Quebec. The wingspan is 31–37 mm. Adults are on wing from March to September in the south . There are two generations per year.

The larva feed on ''Alnus'', ''Shepherdia canadensis'', ''Prunus serotina'' and ''Salix''.