Similar to hosts, exact collection sites (shown on the maps as red markers) were gathered from field observations, museum collections, and published accounts. These red markers provide an incomplete representation of the distribution of a species. This is because it is impossible to pinpoint all of the places where a species may be found. Thus, it is necessary to infer distribution based on these points, known host ranges, and regional climate. The inferred distribution consists of the land on the map that is shaded in light blue. This estimate will always need improvement from actual field data (i.e., the red markers).
For species where we have no records of exact collection sites and only know of very few countries that the species has been found in, we cannot infer a range. Instead, the countries it has been found in are outlined in blue.