 However, the other Hawaiian honeycreepers are remarkably uniform in their breeding behavior, and it is therefore likely that the hookbills also bred from early winter through the end of summer in August, with pair bonding being completed by January or February.The males likely defended a territory that moved along with his bonded female and became a centered around the nest after the female constructed it.It is hypothesized that the hookbill laid two to three eggs and that its young were altricial.