Tree swallow (Tachycineta bicolor) demographics and metal(loid) concentrations in egg contents from the Kootenai River basin, Montana nest box colonies. - Balmer BC; Skorupa JP; Adams KB; Creel BM; Hoffman GC; Fylling MA; Le S; Martin JM; McBride TL; Williams JT; Schmidt TS (Environmental monitoring and assessment, 2025)