"It is an honour for us to be able to remember Mary in this way, and we are deeply grateful for the donation from Mary's loved ones that has enabled us to do so."
In addition, the team has purchased a large plant to be placed near the painting as a living memorial to their much-missed colleague.
Some of her former colleagues attended the unveiling at the maternity ward, which was known as McEwen's second home.
The Whangārei-born midwife started to work closely with families when she joined the Maungatapere playcentre as a worker over 30 years ago.
She then trained as a Karitane nurse and worked for Plunket for 10 years, before becoming a registered nurse with the Northland District Health Board in 1997.
Two years later, McEwen completed her midwifery training, delivering 950 babies in the course of her career.
McEwen was a strong advocate for breastfeeding and also worked as a lactation consultant.
She passed away in 2019.
"Mary's whānau understood her passion for providing very good care to women," Bree said. "Especially to young hapū māmā [pregnant mothers-to-be] where she felt she could really make a difference by helping them create great attachment and early parenting skills."