Figure 1From: The importance of having a partner: male help releases females from time limitation during incubation in birdsRelationship between total nest attentiveness (squared) and A) male and female nest attentiveness, and B) incubation feeding (square-root transformed) in species with biparental incubation ( N = 124) and male incubation feeding ( N = 156), respectively. Points are species averages and fitted lines are ordinary linear regressions for illustrative purposes only.Back to article page