Among birds, the sex that invests less in parenting of offspring tends to be

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In many bird species, the male invests less in parenting (e.g., incubating eggs, feeding chicks) compared to the female. Instead, males often invest more in attracting mates, which is why they tend to be larger and more brightly colored than their female counterparts. This is a common pattern in the animal kingdom, where the sex that competes more for mates often has more elaborate physical traits.

Among Birds, the Sex That Invests Less in Parenting of Offspring