Size, not color, drives assortative mating and influences fledging survival, weight and immunity in a polymorphic owl.

3 a), although this result was only marginally significant, and with higher PHA response (Estimate ± SE = 0.07 ± 0.03, t 104 = 1.94, p = 0.05; Fig. 3 b) (Table 2 ).

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