[1] Eresia lansdorfi, the false erato or Lansdorf's crescent, is a butterfly of the family Nymphalidae.

The forewings have a yellowish basal stripe, while the postdiscal area is light red brown, including the costal bar.

The hindwings have a pale yellow transverse band.

[2] This medium-sized species imitates (Batesian mimicry) two local subspecies of Heliconius erato (hence the common name) and Heliconius melpomene.

[4] This species can be found in Brazil, Northern Argentina, Paraguay, Uruguay and Peru.