Phalaropes are shorebirds that have adapted to swimming. They have lobes on their toes, similar to grebes. Although often reported to spin in spirals, most of the ones I see don't spin. Instead they seem to rotate back and forth. Evidently this action creates small eddies which bring zooplankton to the surface. Phalaropes are famous for sex role reversal. Females, such as this have a brighter breeding plumage than males and are often polyandrous. The males incubate and care for the young. Formerly called Northern Phalarope and placed in monotypic genus Lobipes. Canon PowerShot SX50 HS.
References:
Rubega, Margaret A., Douglas Schamel and Diane M. Tracy.(2000).Red-necked Phalarope (Phalaropus lobatus), The Birds of North America (P. G. Rodewald, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America: https://birdsna.org/Species-Account/bna/species/renpha
Van Gils, J., Wiersma, P. & Kirwan, G.M. (2017). Red-necked Phalarope (Phalaropus lobatus). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from http://www.hbw.com/node/53945 on 9 July 2017).