Full report - Conservation Gateway

Chapter 12 - Coastal & Marine BirdsTable 12-1. Criteria used to determine critical areas for seabird and shorebird conservation targets.Habitat Breeding Wintering Stopover or ConcentrationArctic Tern Marine A site with greater than10 pairs that has beenoccupied within the past15 yearsLeast Tern Coastal A site with greater than50 pairsRoseate Tern Marine A site with greater than10 pairs that have beenoccupied within the past15 yearsPiping Plover Coastal A site with more thanfour piping plover pairsduring the most recentyear for which we havedata, or where there weregreater than four pairs atany point during the pastfive years and the populationcontinues to be morethan three pairsRazorbill Marine A site with more than 20pairs hat have been occupiedin five of the pastten yearsOne well-known winteringconcentration area waBarrow’s Goldeneye Marine A site where ten or moreBarrow’s goldeneye havebeen observed in someyears (State of Maineand the Canadian WildlifeService)Harlequin Duck Marine A site with greater than 25birds occupying the areafor more than one monthper yearRed Knot Coastal An important stopover areas wasdefined as a beach where morethan 500 individuals have beenrecorded in one day, has been usedconsistently over the past 10 years,and is relatively protected from humandisturbanceAudubon’sShearwaterMarineThe area of concentration wasbased upon water depth informationand expert opinion (David Lee)12-Northwest Atlantic Marine Ecoregional Assessment • Phase 1 Report