 When catching an insect outside a web , a Portia sometimes lunges and sometimes uses a " pick up " , : 441 in which it moves its fangs slowly into contact with the prey . In some pick ups , Portia first slowly uses its forelegs to manipulate the prey before biting . : 441 P. labiata and P. schultzi also occasionally jump on an insect . : 448 However , Portias are not very good at catching moving insects : 516 and often ignore them , while some other salticid genera , especially the quick , agile <unk> and <unk> , perform well against small insects . : 516 
