The Geographical Coexist of the Migratory Birds, Ticks, and Nairobi Sheep Disease Virus May Potentially Contribute to the Passive Spreading of Nairobi Sheep Disease

Table 1

Data layer and source used for NSD spatial distribution model.

Layer	Source	Value/categories	Variable/proxy
Climate
Monthly P (prec1–12)	CHELSA	0–275 mm/month	Precipitation
Monthly mean T (temp1–12)	CHELSA	−32.6 to 37.3°C	Mean temperature
Monthly min T (tmin1–12)	CHELSA	−37.3 to 30.5°C	Minimum temperature
Monthly max T (tmax1–12)	CHELSA	−27.9 to 43.6°C	Maximum temperature
Bioclimatic (bio1–19)	CHELSA		Annual trends, seasonality, extreme, or limiting environmental variables
Terrain
Elevation	ASTER-GDEM	−121 to 7,226 m a.s.l	Overall effect on host and tick
Soil moisture	GEOSS	0–0.00082 m^3/m^3	Ticks survival
Vegetation
Land cover	ESA	Cropland (3), herbaceous, tree (9), shrubland (3), grassland, urban areas, bare areas (2), mosaic shrub and herbaceous cover, water bodies, permanent snow, and ice	Host animal food and refuge; ticks host-seeking
Host
Sheep density	GLW3	0–1,202.6 ind/km^2	Host–disease interaction
Goat density	GLW3	0–2,768.9 ind/km^2	Host–disease interaction