The species is threatened by wetland degradation and loss through drainage for agriculture (e.g. rice-farming and fishing), changes in current management practices (e.g. of rice-farming) and contamination from agricultural and industrial operations (Kushlan and Hancock 2005). The species is also susceptible to avian influenza so may be threatened by future outbreaks of the virus (Ellis et al. 2004, Melville and Shortridge 2006), and it previously suffered from hunting for the plume trade (although this is no longer a threat) (del Hoyo et al. 1992, Kushlan and Hancock 2005). Nesting colonies of E. g. dimorpha are depredated by villagers in Madagascar (Langrand 1990).
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