Fig. 2.

New detections based on the ovitrap and Mosquito Alert tiger mosquito surveillance performed in the south of Spain in 2014–2015 (as in Fig. 1). Municipalities surveilled with ovitraps during 2015 but ending in no-detections are shown in light dashed blue (source data from ref. 18). Note that a lot of sampling effort is unsuccessful (light dashed blue). Successful detections come from ovitraps alone (dark blue), citizen scientists alone (yellow) or both ovitraps and citizen scientists (light red). In 4 out of the 12 red municipalities, ovitrap surveillance was triggered by citizen science alerts through the Mosquito Alert platform but citizen science reports cannot always be confirmed in the field (e.g. ovitraps are not always placed in municipalities where citizen science reports suggest presence; even when they are placed in these municipalities low ovitrap or population densities may generate false negatives). Boundary data from Spanish National Geographic Institute⁵³. © Instituto Geográfico Nacional