Butterfly and Nymphalid butterfly

Butterfly noun - Diurnal insect typically having a slender body with knobbed antennae and broad colorful wings.

Nymphalid butterfly and butterfly are semantically related. In some cases you can replace phrase "Nymphalid butterfly" with "Butterfly", this terms are similar.

Nymphalid butterfly noun - Medium to large butterflies found worldwide typically having brightly colored wings and much-reduced nonfunctional forelegs carried folded on the breast.

Butterfly and nymphalid butterfly are semantically related. You can use "Butterfly" instead a noun phrase "Nymphalid butterfly".