 In P. labiata and in some other species , contests between males usually last only 5 to 10 seconds , and only their legs make contact . : 466 Contests between Portia females are violent : 518 and embraces in P. labiata typically take 20 to 60 seconds . These occasionally include grappling that sometimes breaks a leg , but more usually one female lunges at the other . Sometimes one knocks the other on her back and the other may be killed and eaten if she does not right herself quickly and run way . If the loser has a nest , the winner takes over and eats any eggs there . : 466 – 467 
