Gavin Hellier / Opened in 2010, the Dubai Metro, MRT, in motion along Sheikh Zayed Road at dusk, Dubai, United Arab Emirates. No release available.

Laurent Geslin / House cricket (Acheta domesticus) in a metro station in Paris, France

Gavin Hellier / Opened in 2010, the Dubai Metro, MRT, in motion approaching a station, Dubai, United Arab Emirates 2011

DAVID TIPLING / Broad billed motmot {Electron platyrhynchum} Metro Park, Panama City, Panama.

DAVID TIPLING / Ruddy-tailed Flycatcher {Terenotriccus erythrurus fulvigularis} perching on branch, Metro Park, Panama City, Panama.

DAVID TIPLING / Female Slaty tailed Trogon {Trogon massena hoffmanni} Metro Park, Panama City, Panama