Reptiles are not easily sighted; even if they would be, a nationwide count would not be feasible due to the large distribution ranges. In order to attain a good picture/impression of population development, it’s important to collect data over time. To do so, part of a species’ population is systematically counted in a well-marked area (plot). Counting is done by means of a quantitative sample. Practically, this means visiting a plot and counting various species that are sighted.
Plot surveys are carried out repeatedly over time (7 times a year), so that species populations’ development can be followed. The process of repeated counting is called monitoring.
The key to surveying a plot is to walk the area slowly and quietly, halting every few yards to scrutinize the environment.