Mariana Wandering Butterfly (Vagrans egestina)
The Mariana Wandering Butterfly was restricted to the islands of Guam and Rota in the southern part of the Mariana Islands chain.
The butterfly inhabited the forests on the lime cliffs wherever Luluhut (Maytenus thompsonii (Merr.) Fosberg), the food plant of its caterpillars was found. [1]
The local name of this butterfly is Ababbang (in Chamorro), bzw. Libwueibogh (in Carolinian).
The species was last seen on Guam in 1979 and is considered as being extinct at least there, the last record of the species on the neighboring island of Rota took place in 1995, when only some male specimens were found but no female ones nor any eggs or caterpillars.
The Mariana Wandering Butterfly is now most likely globally extinct.
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References:
[1] Ilse Schreiner; Donald Nafus: Survey of rare butterflies in the Mariana Islands. Preliminary report to USFWS. 1-10. 1995
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edited: 20.09.2020