Eurasian oystercatcher
The Canary Islands oystercatcher has had a complicated taxonomic history. Though it was long known to naturalists, it was considered a mere local population or subspecies of the African oystercatcher ("Haematopus moquini") until 1913; these two were at the time occasionally lumped as subspecies of the Eurasian oystercatcher ("Haematopus ostralegus"). Hockey (1982) concluded that the Canary Islands oystercatcher was actually a full species, distinct from the African oystercatcher. However, DNA analyses conducted in 2018 and published in 2019 concluded that the Canary Islands oystercatcher was most likely a subspecies of the common Eurasian oystercatcher.