The reserve lies within the Kazimierski Landscape Park and includes Cow Island, located on the Vistula, sandy shallows and coastal waters [3].
area: 62.30 ha [2]
year of creation: 1991
document citing: Ordinance of the Minister of Environmental Protection, Natural Resources and Forestry of October 9, 1991 regarding recognition as a nature reserve (MP No. 38, item 273).
subject of protection (according to the appointing act): preservation of breeding sites for many bird species.
Birds nesting on the island include, among others: oystercatcher, ringed plover, river plover, lapwing, white-headed gull, black-headed gull, common gull