Figure 2 in New fossil mousebird (Aves: Coliiformes) with feather preservation provides insight into the ecological diversity of an Eocene North American avifauna

Figure 2. Map of the USA showing the extent of the Green River lake system during the late early Eocene (modified from Grande & Buchheim, 1994). Fossil Lake is enlarged on the right, with locality letters and distribution of major lithofacies following the system of Grande & Buchheim (1994). Localities A (Lewis Ranch Site 1, type locality of Celericolius acriala) and K (Warfield Springs, type locality of the sandcoleid Anneavis anneae) have yielded fossil Coliiformes.