Where does “swampwatcher” come from?

swampwatcher (English) comes from English swamp, from Middle English swam, from Old English swamm, from Proto-Germanic *swammaz, from Proto-Indo-European swombh- — sponge, tree-fungus, swamp.

swampwatcher (English): A species of libellulid dragonfly, Potamarcha congener, of Southeast Asia and northeastern Australia

Definitions

  1. A species of libellulid dragonfly, Potamarcha congener, of Southeast Asia and northeastern Australia

Ancestry of “swampwatcher”, step by step

swampwatcher traces back through two separate lines of ancestry.

via English swamp

StepLanguageWordMeaning
1EnglishswampA piece of wet, spongy land; low ground saturated...
2Middle Englishswamswamp, muddy pool, bog, marsh", also "fungus,...
3Old Englishswammmushroom, fungus; sponge; first/third-person...
4Proto-Germanic*swammaz
5Proto-Indo-Europeanswombh-sponge, tree-fungus, swamp

via English watcher

StepLanguageWordMeaning
1EnglishwatcherSomeone who watches or observes; Someone who...
2Middle Englishwacchere
Every word from Proto-Indo-European swombh-