A pet store owner in Kamo near Whangarei says the people who stole 15 budgies from his shop were professional and knew what they were doing.
The birds were stolen overnight on Wednesday from the Kamo Pet and Aquatic Centre, but nothing else was taken.
Owner John Drummond said police were investigating but he had no idea where the birds were or why they were stolen.
He said his main concern was that they were cared for.
"It's more the wellbeing of the birds, we'd just like to know at least that they're off to a good home or they haven't been injured or anything like that.
"It's not about the money and what we paid fo them, it's where they've gone and are they being looked after."
Mr Drummond said he has had lots of messages of support from people who were shocked at the theft.