As well as standard gauge Crocodiles, there are also narrow gauge versions.
The best known are the Rhaetian Railway (RhB)'s metre gauge locomotives of class Ge 6/6 I, the Rhaetian Crocodile.
 Several of these still run on passenger trains on special occasions.
 They are also used on freight trains in busy periods.
 The Bernina Railway (later merged with the RhB) also built a single Crocodile type, the Ge 4/4, nicknamed the "Bernina Crocodile".
 This locomotive survives and is being restored to operating condition.

Two other Swiss narrow-gauge railways also have locomotives nicknamed Crocodiles; the BVZ Zermatt-Bahn (BVZ) (which merged with the Furka Oberalp Bahn (FO) in 2003 to form the Matterhorn-Gotthard-Bahn) uses series HGe 4/4 I, known as the Zermatt crocodile, while the Chemin de Fer Yverdon-Ste.
Croix owns a solitary class Ge 4/4 #21.
 Neither of these locomotive types have an articulated body, which leads some railfans to nickname them "false crocodiles".
As well as standard gauge Crocodiles, there are also narrow gauge versions. The best known are the Rhaetian Railway (RhB)'s metre gauge locomotives of class Ge 6/6 I, the Rhaetian Crocodile.  Several of these still run on passenger trains on special occasions.  They are also used on freight trains in busy periods.  The Bernina Railway (later merged with the RhB) also built a single Crocodile type, the Ge 4/4, nicknamed the "Bernina Crocodile".  This locomotive survives and is being restored to operating condition.
Two other Swiss narrow-gauge railways also have locomotives nicknamed Crocodiles; the BVZ Zermatt-Bahn (BVZ) (which merged with the Furka Oberalp Bahn (FO) in 2003 to form the Matterhorn-Gotthard-Bahn) uses series HGe 4/4 I, known as the Zermatt crocodile, while the Chemin de Fer Yverdon-Ste. Croix owns a solitary class Ge 4/4 #21.  Neither of these locomotive types have an articulated body, which leads some railfans to nickname them "false crocodiles".
Crocodile (locomotive)