"They've been flying across the Tasman from Australia for a long time now, with the first reported sighting in 1947, but they weren't recorded breeding here until 2008," Shannon says.
"So there's more to learn about what their impact will be, whether they will affect the populations of the prey they eat, and whether they compete with other native species - so far we consider their presence to be fairly benign."
The workshop was funded by a $6580 grant from the ANZ New Zealand Staff Foundation and included attendees from the Department of Conservation, private conservation and restoration groups, students, and people working in bird rehabilitation.
"The grant covered staff salaries and equipment, as well as allowing us to offer the workshop free of charge,” Shannon says.
"We generally don't receive government funding, or through local bodies, but we do have a member base who contribute donations, and we rely a lot on volunteers to help us do the work we do."
After the success of the pellet dissection workshop, Wingspan is now looking to run a series of similar events in future, with the hope that skills and knowledge in this area can be passed on, and research and conservation of our birds of prey can continue into the future.