Seagull Nebula (IC 2177) in Monoceros
The name Seagull Nebula is sometimes applied by amateur astronomers to this emission region, although it more properly includes the neighboring regions of star clusters, dust clouds and reflection nebulae. This latter region includes the open clusters NGC 2335 and NGC 2343.
[description from wikipedia]
Robert Gendler has created an annotated image of the central part of this very interesting region.
[courtesy Robert Gendler]