Why don't all siblicidal eagles lay insurance eggs? The egg quality hypothesis

• Several species of birds lay second eggs that are eliminated by the siblicidal behavior of the first-hatched chick. A widely accepted explanation for the occurrence of these second eggs is insurance against complete nest failure, However, if insurance is

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Aquila wahlbergi; brood manipulations; egg quality; insurance; siblicide; Wahlberg's eagle; BLACK-BACKED GULL; BROOD REDUCTION; CLUTCH-SIZE; SIBLING AGGRESSION; EUDYPTES-CHRYSOLOPHUS; OFFSPRING QUALITY; BREEDING SUCCESS; CHICK SURVIVAL; GREAT TITS; BIRDS

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