 Some of the characteristics shared with these other groups, including falcons, owls, skuas and shrikes, are that the female is typically larger than the male, extreme devotion for breeding pairs to each other and often to a dedicated nesting site, strict and often ferocious territorial behavior, and, on hatching, occasional competition amongst nestlings, including regular siblicide in several species.Before the onset of the nesting season, adult accipitrids often devote a majority of their time to excluding other members of their own species and even of other species from their nesting territories.In several species, this occurs by territorial display flights over the border of their breeding ranges.