Figure 4 from: Marcondes RS, Silveira LF (2015) A taxonomic review of Aramides cajaneus (Aves, Gruiformes, Rallidae) with notes on morphological variation in other species of the genus. ZooKeys 500: 111-140. https://doi.org/10.3897/zookeys.500.7685

Figure 4 - Length of tarsus of specimens in the Aramides cajaneus complex plotted against latitude and longitude. Green: Aramides albiventris; blue: Aramides cajaneus; yellow: Aramides avicenniae. Note the discontinuity in variation around latitude 10° N and longitude 83° W, in Costa Rica, where the distributions of Aramides cajaneus and Aramides albiventris abut each other.