Kustusch K, Cząstkiewicz D, Wuczyński A. Assessing abundance and habitat preferences of Goldcrest Regulus regulus and Firecrest Regulus ignicapilla using passive acoustic monitoring and point-count surveys in temperate forest ecosystem in Poland. Ornis Fenn. Published online March 11, 2026:00-00. doi:10.51812/of.154841