butterfly collector(n = noun.person) lepidopterist, lepidopterologist - an entomologist who specializes in the collection and study of butterflies and moths;
is a kind of bug-hunter, bugologist, entomologist

bill collector, book collector, brush-footed butterfly, butterfly, butterfly bush, butterfly effect, butterfly fish, butterfly flower, butterfly nut, butterfly orchid, butterfly orchis, butterfly pea, butterfly plant, butterfly ray, butterfly stroke, butterfly valve, butterfly weed, cabbage butterfly, coin collector, collector, collector of internal revenue, comma butterfly, danaid butterfly, emperor butterfly, four-footed butterfly, garbage collector, greater butterfly orchid, hairstreak butterfly, lesser butterfly orchid, lycaenid butterfly, milkweed butterfly, monarch butterfly, mourning cloak butterfly, nymphalid butterfly, peacock butterfly, pierid butterfly, pinwheel wind collector, refuse collector, rent collector, ringlet butterfly, sea butterfly, solar collector, southern cabbage butterfly, stamp collector, sulfur butterfly, sulphur butterfly, tax collector, ticket collector, toll collector, tortoiseshell butterfly, troilus butterfly