What led Cole to chase away the birds so that he could eat the half food in chapter 7

Cole is just really hungry: he needs food. In the morning, he finds food by scaring away seagulls and stealing the fish that they had caught. Cole planned to try again to escape the island when the tide receded in the afternoon, but before he had the chance, he sees the Spirit Bear at the intersection of the stream and the bay. He rushes the bear and approaches it closely. He aims the spear at the Spirit Bear.