“…In addition, there are a number of domain specific (i.e. "finegrained") datasets covering object categories such as airplanes [44,59], birds [60,3,57,36], dogs [32,51,42], fashion [31], flowers [47,48], food [4,28], leaves [39], vehicles [37,41,62,17], and, of course, human faces [29,50,22,5]. Most closely related to our work are the existing iNaturalist species classification datasets [58,2], which contain a set of coarse and fine-grained species classification problems.…”