sentences:  Rosenberg's tree frog
  
  Rosenberg's treefrog ("Hypsiboas rosenbergi"), also known as Rosenberg's gladiator frog or Rosenberg's gladiator treefrog, is a species of frog in the family Hylidae found in Costa Rica, Panama, Colombia, Trinidad and Tobago and north-western Ecuador.Its name is a testimony to Mr. W. F. H. Rosenberg who collected the type series, and in English, to the aggressiveness of males of the species.