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Oyster Attack: Heron's Toe Held Captive by Mollusk
4 May
Summary
- A great blue heron was rescued after an 18-centimetre oyster clamped onto its toe.
- Veterinarians anesthetized the oyster to safely release the bird's foot.
- The heron will require toe amputation but is expected to recover fully.
A Pacific great blue heron faced a life-threatening situation when an 18-centimetre oyster clamped down on its toe. Rescuers were alerted by a biologist who observed the distressed bird struggling in False Creek as the tide rose. A specialized team, including veterinarian Dr. Adrian Walton, responded to the unusual "oyster attack."
Dr. Walton, who has experience with oyster farming, determined that conventional methods to detach the mollusk would only cause it to tighten its grip. Instead, the team successfully anesthetized the oyster using MS-222, a substance typically used for amphibians and fish, allowing them to safely open the shell and free the heron.
The bird suffered ligament damage and will require the amputation of its toe. However, it is expected to recover with a few days of rehabilitation. This rescue was particularly important as blue herons are classified as a species at risk in British Columbia, and the incident occurred during fledging season.
