Spatial distribution of the red supergiants belonging to the Cygnus region, overplotted on a mosaic of infrared images obtained by the Midcourse Space Experiment (MSX) satellite in the infrared band A (6.0−10.9 μm) that outlines the distribution of warm dust. Blue triangles indicate the positions of stars younger than 20 Myr, and red circles those of older stars. The approximate boundaries of present-day associations as listed by Uyanıker et al. (2001) are indicated. The pervading nebulosity between l ≃ 77° and l ≃ 83° outlines the Cygnus X molecular complex.