U.S. Fish & Wildlife ServiceThe SWFL satellite model outputs a continuous range of model probabilities (Hatten and Paradzick, 2003). In this layer, a probability threshold was set at 40 percent. Thus, areas with model probabilities less than 40% were considered less suitable breeding habitat and were excluded from the map. Model probabilities greater than 40% were aggregated into three probability classes: 40 - 60% (class 3), 60.1 - 80% (class 4), 80.1 - 100% (class 5). Studies have shown that SWFL territories increase exponentially as class value increases. For a complete description of methods and interpretation of maps, see Hatten and Paradzick, 2003; Hatten, 2016. The layer title ( SWFL_RW_Top3cl_May1_June30_2025 ) is interpreted as follows: SWFL = Southwestern Willow Flycatcher; RW = Rangewide application of satellite model (56 Landsat-9 scenes) ; Top3cl = top three probability classes displayed on map (locations with a value less than 40% are not shown on the map); May1_June30 = range of dates that an image mosaic was created from Landsat 9 imagery, with the least cloudy images selected; 2023 = year of image selection; Version 5 (v5) was used as the mask to mask out background noise (i.e., non-riparian features that could confuse the model). Hatten, J.R., and C.E. Paradzick. 2003. A multiscaled model of southwestern willow flycatcher breeding habitat . Journal of Wildlife Management, 67: 774-788. https://www.jstor.org/stable/3802685?seq=1 Hatten, J.R., 2016, A satellite model of Southwestern Willow Flycatcher ( Empidonax traillii extimus ) breeding habitat and a simulation of potential effects of tamarisk leaf beetles ( Diorhabda spp.), Southwestern United States: U.S. Geological Survey Open-File Report 2016-1120, 88 p., https://pubs.er.usgs.gov/publication/ofr20161120ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/c0a6a56149754f278608102e3d42043a_0engU.S. Fish and Wildlife Service Open DataPublicSWFL RW Top3 May1 June30 2025 [United States]Web servicesUnited States2025