Difference between Gallinule and Swamphen

What is the difference between Gallinule and Swamphen?

Gallinule as a noun is several species of birds in the genera porphyrio and gallinula of the family rallidae. while Swamphen as a noun is several species of bird in the genus porphyrio of the family rallidae.

We hope you now know whether to use Gallinule or Swamphen in your sentence.