I found that because House Finches hatch and raise multiple broods a season (There is a lot of attrition among the young.) the males do almost all of the care and feeding of the Fledglings while the females start a new batch of eggs.

Here is one Father earning his right to the title "Dad".

I was reminded because I just got a call from our daughter (my step-daughter but has called me Daddy since she was 4) at Medical School for "Dad's Day" as she called it.

She says I earned the title "Dad" the hard way so I am the only one who gets to be called that by her.