Such tendency can be supported by the international market (Lenzen et al., 2012) and might result on a massive biodiversity loss (Sodhi et al., 2004) in specialist forest birds (Sodhi et al., 2005).
Palm oil plantations hold less than half (38%) of the vertebrate species than the primary forest with only 23% found in both environments (Danielsen et al., 2009). However, insectivorous birds prey on insects that attack palm oil plants (Koh, 2008a).