Head to head
Common Moorhen vs Common Gallinule
The common moorhen and common gallinule look so alike that they were considered one and the same species for most of scientific history, only recognised as distinct in 2011.
| Common Moorhen | Common Gallinule | |
|---|---|---|
| Scientific name | Gallinula chloropus | Gallinula galeata |
| Native range | Europe, Africa, Asia | North, Central, and South America |
| Taxonomic history | Split from common gallinule in 2011 | Split from common moorhen in 2011 |
| Visual appearance | Nearly identical to its counterpart | Nearly identical to its counterpart |
| Bill shield | Red with yellow tip | Red with yellow tip |
| Conservation status | Least Concern | Least Concern |
| Population trend | Stable | Stable |
| Habitat | Wetlands | Wetlands |
Common Moorhen vs Common Gallinule: common questions
Why were the common moorhen and common gallinule once considered the same species?
These two species look nearly identical and share the same bill shield colouring, long toes, and swimming style, a resemblance close enough that they were treated as a single species until a 2011 taxonomic revision finally confirmed sufficient genetic and physical difference to split them apart.
How can you tell a common moorhen from a common gallinule?
Visually, the two species are extremely difficult to distinguish, and the most reliable way to tell them apart is by range, since the common moorhen occupies Europe, Africa, and Asia, while the common gallinule instead occupies North, Central, and South America.
What finally justified splitting these two species apart?
A 2011 taxonomic revision examined genetic and physical differences between the Old World and New World populations closely enough to conclude that they had diverged sufficiently to warrant recognition as separate species, ending decades of the two being treated as one.