Figure 4 from: López-Collar D, Cabrero-Sañudo FJ (2021) Update on the invasion status of the Argentine ant, Linepithema humile (Mayr, 1868), in Madrid, a large city in the interior of the Iberian Peninsula. Journal of Hymenoptera Research 85: 161-177. https://doi.org/10.3897/jhr.85.65725

Figure 4 Argentine ant workers photographed in the city of Madrid. Both photographs belong to the citizen science platform 'Biodiversidad Virtual'. A Real Jardín Botánico of Madrid, by José Fernández (Biodiversidad Virtual 2016). B Puerto Rico Street, Nueva España Neighbourhood, by Álvaro Izuzquiza (Biodiversidad Virtual 2011).