trädmås (Swedish) comes from Swedish träd, from Old Norse þráðr, from Proto-Germanic þrēduz, from Proto-Indo-European treh₁-tu-, from Proto-Indo-European terh₁- — to rub, turn; to drill, pierce.
trädmås (Swedish): a Bonaparte's gull (Chroicocephalus philadelphia)
Definitions
a Bonaparte's gull (Chroicocephalus philadelphia)
Ancestry of “trädmås”, step by step
trädmås traces back through two separate lines of ancestry.