Irwin worries about being single parent

Terri Irwin's mother has revealed the newly widowed conservationist is worried about coping with raising her children alone.

Following the tragic death of "Crocodile Hunter" Steve Irwin earlier this week, Terri has been left to raise 8-year-old Bindi and 2-year-old Robert as a single parent.

Her mother Julia Raines told Inside Edition: "It's going to be hard being the only parent, because you depend on the other person more than you realise, and she's having a hard time [coming to terms] with that."

According to the New York Post, Raines also related: "[Terri] told me, 'I'm very concerned about raising the children by myself,' but I know she'll do well...Robert asks, 'Where Daddy?' because he's only 2, but Bindi has been a big help to Terri. She's been her rock."