Recommended citation: Global Invasive Species Database (2025) Species profile: Psittacula alexandri. Downloaded from http://iucngisd.org/gisd/speciesname/Psittacula+alexandri on 14-01-2025.
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MO
Psittacula alexandri
Date assessed
2021-10-15
Year published
2023
Eicat category
MO (Moderate)
Justification for EICAT assessment
It is possible that competition with Red‐breasted Parakeets is causing the decline of the Long-tailed Parakeet (Psittacula longicauda), with loss of suitable nest holes. The abundance of Long‐tailed Parakeet has dropped, while Red‐breasted Parakeet abundance has increased in parrot counts (Yong and Owyong 2012).
Confidence rating
Low
Mechanism(s) of maximum impact
Competition
Countries of most severe impact
Republic of Singapore
Description of impacts
The Red-breasted Parakeet feeds on native plant species and it is possible that competition with Red‐breasted Parakeets is resulting in a decline of native Long-tailed Parakeets in Singapore.
Assessor
Tom Allmert; Thomas Evans
Contributors
Reviewers
EICAT authority
Recommended citation
Tom Allmert, Thomas Evans (2025). Psittacula alexandri. IUCN Environmental Impact Classification for Alien Taxa (EICAT).