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We present a study of active star‐forming regions in the environs of the H  ii  region Sh2‐205. The analysis is based on data obtained from point source catalogues and images extracted from the Two‐Micron All‐Sky Survey (2MASS),  Midcourse Space Experiment  ( MSX ) and  IRAS  surveys. Complementary data are taken from a CO survey. The identification of primary candidates for star‐formation activity is made following colour criteria and a correlation with molecular gas emission.  A number of star‐formation tracer candidates are projected on to two substructures of the H  ii  region: SH 148.83–0.67 and SH 149.25–0.00. However, the lack of molecular gas related to these structures casts doubt on the nature of the sources. Additional infrared sources may be associated with the H  i  shell centred at  ( l ,  b ) = (149°0′, −1°30′) .  The most striking active area was found in connection with the H  ii  region LBN 148.11–0.45, where star‐formation candidates are projected on to molecular gas. The analytical model of the ‘collect and collapse’ process shows that star‐formation activity could have been triggered by the expansion of this H  ii  region.

Sh2‐205 – II. Quiescent star‐formation activity