Less common waders usually occur on passage in September, mainly shore waders such as Little Stints, occasionally marsh waders as well. Rarer gulls can occur. Alderney has several pairs of resident Barn Owls. Short-eared Owls can occur from October onwards. Visible migration in September and into October involves Swallows, House Martins, Sand Martins and all sorts of other passerine migrants.
Migration depends on weather and visibility.
Days that are clear and sunny, both in Alderney and at departure points in southern England, can produce numbers of passing birds. The best place to see these is generally the heath area at the extreme western edge of the island. Because the migrants have to cross an expanse of ocean before reaching Alderney, they generally start arriving on the island at about 10.00 a.m. or 11.00 a.m. Migration can continue until early afternoon. Skylarks and Meadow Pipits arrive during September and October, some stay and some pass on.