The orphaned daughter of former All Black Jerry Collins is improving every day according to her guardians, who say she is "thriving" and a "happy baby" after surviving the horrific car crash which claimed her parents' lives.

New photos of baby Ayla show the four-month-old in the arms of her devoted aunts, who say the little girl is an encouragingly "big baby" who is growing stronger and "continues to be a little fighter", Fairfax Media reports.

"She's a big baby and a good eater ... She's a really good sleeper at night and she's a happy baby," Ayla's aunt Nora Madill said. "She continues to be a little fighter. She truly is a miracle to us."

The new photos come just days before Ayla's mother, Alana Madill, will finally be laid to rest in Canada.