NHS Grampian said about 25 maggots were found by cleaners
Specialists probing an outbreak of maggots at the Royal Aberdeen Children's Hospital believe the carcass of a chick could be to blame.
The discovery of the maggots caused the closure of three operating theatres, and postponements of procedures.
NHS Grampian said about 25 maggots were found by cleaners on the floor.
What is believed to be the carcass of a chick was found in pipes above two theatres and has since been removed. No further infestation has been found.
NHS Grampian said generally high levels of hygiene had been found and the roof space was clean and in good order.
Health Secretary Nicola Sturgeon said she had been "very disturbed" after first reports of the incident.