 <unk> brood parasites are common in common starling nests . Female " <unk> " ( <unk> females during the breeding season ) present in colonies often lay eggs in another pair 's nest . Fledglings have also been reported to invade their own or neighbouring nests and evict a new brood . Common starling nests have a 48 % to 79 % rate of successful fledging , although only 20 % of nestlings survive to breeding age ; the adult survival rate is closer to 60 % . The average life span is about 2 – 3 years , with a longevity record of 22 <unk> 11 m . 
