In this paragraph you said: Despite their popularity, surprisingly few studies have examined survey results to offer guidelines for efficient study design (Rowcliffe et al., 2008; Tobler et al., 2008; Rovero & Marshall, 2009; but see Williams, Nichols & Conroy, 2002; MacKenzie et al., 2006).

However, the following two paragraphs, it seems that there have been lots of researchers explored this i...

This question of the best way to use camera traps is especially important in species-rich areas, such as tropical America. Your study had only 9 common species, while a similar area in tropical Brazil will have many more species, many of which are uncommon. Can you extrapolate from your study to a more species-rich setting? If so, what would you recommend as the best strategy?