Male emperor penguins make excellent fathers. The male incubates an egg after the female lays it by balancing it on his foot and covering it with a flap of skin. He holds the egg near his brood pouch to keep it warm.
Male seahorse species are the ones who become pregnant. The female deposits her eggs in a specialized pouch on the male's belly, where they are fertilized and gestated until the seahorse offspring are ready to be born.
Male marmosets actively care for their young. They help with the carrying, grooming, and protection of their offspring. Males may even take up the primary caregiver role in some circumstances.
Emperor tamarin monkeys share parental duties. Fathers actively care for and carry their children, developing strong relationships throughout the family group.
Red fox males are active fathers. They help to provide food for the mother and the kits, ensuring that the family is well-nourished during the kits' early life.
Greater rheas, big flightless South American birds, have unusual parental activities. Males construct nests and incubate eggs, and they are the primary caregivers for the chicks once they hatch.
Males take on the role of primary caregivers in jacana bird species. They construct nests, incubate the eggs, and care for the chicks after they hatch.
Wolf spider fathers are known to transport their egg sacs with them. They attach the egg sac to their spinnerets and carry it until the spiderlings hatch, at which point they actively protect the young.
Male Darwin's frogs from Chile and Argentina parent differently. The male watches the eggs after the female lays them until they hatch.