Between March 13 and April 21, 2025, the IceBird CAN25 airborne campaign of AWI’s Polar 6 research airplane took place in Canada, Greenland, and Svalbard to survey characteristic sites of snow on land and sea ice, to observe long-term sea ice variability and change, and to develop new snow remote sensing techniques. During 21 survey flights snow and sea ice in the vicinity of Whitehorse (YT), Inuvik (NWT), Cambridge Bay, Resolute Bay, Pond Inlet (all NU), Station Nord (Greenland), and Longyearbyen (Svalbard) took place. These included overflights of seven sites in Trial Valley Creek, Tuktoyaktuk, Cambridge Bay, Pond Inlet, Resolute Bay and Longyearbyen where collaborators from the SmartIce/Sikunnguak, MOACC, Str3TART, and IceView projects had collected extensive in-situ validation data.