Columbia subject headings:
Birds--Conservation--Guam.
Brown tree snake--Guam.
Mariana crow--Guam.
Harvard subject headings:
Birds--Conservation--Guam.
Birds--Conservation--Northern Mariana Islands--Rota Island.
Brown tree snake--Guam.
Corvus--Guam.
Mariana crow.
Rare birds--Guam.
Rare birds--Northern Mariana Islands--Rota Island.
Princeton subject headings:
Birds--Conservation--Guam.
Birds--Conservation--Northern Mariana Islands--Rota Island.
Brown tree snake--Guam.
Mariana crow.
Rare birds--Guam.
Rare birds--Northern Mariana Islands--Rota Island.