“…Couvet, Jiguet, Julliard, Levrel, & Teyssèdre, 2008;Miller-Rushing, Primack, & Bonney, 2012;Silvertown 2009). The data produced by citizen scientists are considered both a reliable and systematic means to track change in natural environments, particularly within narrowly defined parameters or foci, such as the presence/absence of birds (Butler, 2003) or specific weather patterns (Vetter, 2011). Purdam's (2014) work on street-begging is one of a few examples of citizen science expanded into the social sciences.…”