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OCR: FAMILY LIFE Eurasian Sparrowhawk (Accipiter nisus Newton/VIREO The number of eggs laidis most related to the physical size of the species The number of eggs laid decreases as the size of the raptor increases Two factore account for this relationship: mortality rate and life span. Large raptors have long life spans; many survive for several decades in the wild Long lives mean that replacements are needed less often. Because of their long breeding life large raptors may not breed every ryear, but only in good years when success likely. Smaller raptors which can be prey themselves and are more vulnerable harsh weather, have higher mortality rates They have greater need to replace lost members They also have shorter life spans which means a shorter breeding life To maximize their limited attem ...