Recommended citation: Global Invasive Species Database (2025) Species profile: Dicrurus macrocercus. Downloaded from http://iucngisd.org/gisd/speciesname/Dicrurus+macrocercus on 05-02-2025.
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MN
Dicrurus macrocercus
Date assessed
2020-05-19
Year published
2021
Eicat category
MN (Minor)
Justification for EICAT assessment
The Black Drongo predates on native bird and insect species on Rota and Guam. This predation is believed to have caused a decline in the population of the Rota White-eye (Zosterops rotensis), but studies failed to link predation by Black Drongos with declining populations of native bird species on Rota. No population level impacts have been observed (Maben 1982, Amidon 2000, Fancy and Snetsinger 2001).
Confidence rating
Low
Mechanism(s) of maximum impact
Predation
Countries of most severe impact
U.S.A. (sovereign state) Mariana Islands
Description of impacts
Assessor
Thomas Evans
Contributors
Reviewers
EICAT authority
Recommended citation
Thomas Evans (2025). Dicrurus macrocercus. IUCN Environmental Impact Classification for Alien Taxa (EICAT).