After more than five months without a new outbreak, Iowa has reported four outbreaks of bird flu in commercial poultry flocks in less than a week.

Another flock has been hit by bird flu here in iowa tonight -- it's the sixth this year -- and the fourth reported in a sioux county flock...The other two were

It’s possible that a warm fall delayed the migration of wild birds, which are carriers of the deadly virus. It has recently infected three Iowa flocks.