Eurasian Oystercatcher vs South Island Oystercatcher

In short

The Eurasian Oystercatcher and the South Island Oystercatcher are similar in appearance, both being black-and-white waders with long, orange bills. Key differences lie in their geographic distribution and subtle plumage variations.

Identification tips

1. Location: Check the geographic range; Eurasian in Europe/Asia, South Island in New Zealand. 2. Plumage: Look for the extent of white on the wings and rump. 3. Habitat: Consider the habitat type and location as a clue. 4. Calls: Listen for regional call variations if possible.

Size

Both species are similar in size, with robust bodies and long legs typical of oystercatchers.

Plumage

Eurasian Oystercatchers typically have a more extensive white wingbar and a white rump, while the South Island Oystercatcher may show a more uniform black upperwing and back.

Behaviour

Both species exhibit similar foraging behaviors, often seen probing mudflats or sandy shores for mollusks.

Habitat

Eurasian Oystercatchers are found across Europe and Asia, favoring coastal and inland wetlands, while South Island Oystercatchers are restricted to New Zealand, primarily on South Island's coasts.

Voice

Both species have similar loud, piping calls, though regional variations may exist. Specific vocal differences are not well-documented.