Variation in egg elongation and the proportion of species with domed nests for Australia’s passerines. The maps depict the spatial variation in 1° × 1° grid cells of (a) mean egg elongation for species with domed nests, (b) mean egg elongation for species with cup-shaped nests, and (c) the proportion of species with domed nests. Maps were created in R 3.3.247 using raster68 and base plotting functions. Digital boundaries of Australia are from Australian Standard Geographical Classification (ASGC) (cat. no. 1216.0) via http://www.abs.gov.au/. White grid cells either do not meet the required Completeness Index (i.e. the ratio of the observed species richness to the estimated species richness, see Supplementary Material), or had less than ten species with domed nests or less than ten species with cup-shaped nests. Plots show the relationship between mean grid cell values (response variables) and vapour pressure deficit (kPa). Colored lines depict the predicted response from the simultaneous autoregressive models when LAI is at the mean (yellow line), below the 5th percentile (blue) above the 95th percentile (green line). Nagelkerkes pseudo R2s are given.