House Wren discovery

A couple of days a go I went to get sticks for a fire,Then I noticed that there where lots of House Wrens near the pile of sticks.I watched them for about ten twenty minute then they all flew away.A couple days later we had another fire,The House wrens where still there so I thought about for a minute and then said They must of nested in the sticks.So I try to be really careful getting sticks out of that pile.