Fig. 4From: Tradeoff between robustness and elaboration in carotenoid networks produces cycles of avian color diversificationBirds have shorter and more interconnected enzymatic pathways from dietary to plumage carotenoids than is expected by degree-preserving Erdos-Reyni randomization. Points on diagonal would indicate no difference between random and observed network characteristics. Data points are species network characteristics for either observed (y-axis) or randomized (under degree-preserving rewiring, x-axis) networks. SD is standard deviation for comparison of observed and randomized species networks. **indicates P < 0.01Back to article page