Ducula is a genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of bird

Bird

Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...

 in the pigeon family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 Columbidae; these pigeons are very large and are called imperial pigeons. Most imperial pigeon species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 show contrasting light coloration of the head, neck, and belly with darker back and wings. Some species are white with black wings and tails, others are shades of pinkish-gray or blue-ish gray with dark green, blue, or brown backs and wings. Some species have remarkable features such as bulbous cere

Cère

The Cère is a long river in south-western France, left tributary of the Dordogne River. Its source is in the south-western Massif Central, near the mountain Plomb du Cantal...

s or colored markings around the eyes. Imperial pigeons dwell in trees and eat fruit, thus most species are restricted to undisturbed forest habitats such as rainforest

Rainforest

Rainforests are forests characterized by high rainfall, with definitions based on a minimum normal annual rainfall of 1750-2000 mm...

. They are strong flyers.

Species

• Pink-bellied Imperial Pigeon (Ducula poliocephala)
• White-bellied Imperial Pigeon (Ducula forsteni)
• Mindoro Imperial Pigeon (Ducula mindorensis)
• Grey-headed Imperial Pigeon (Ducula radiata)
• Spotted Imperial Pigeon (Ducula carola)
• Green Imperial Pigeon
  Green Imperial Pigeon
  The Green Imperial Pigeon is a pigeon which is a widespread resident breeding bird in tropical southern Asia from India east to Indonesia. It has a number of subspecies, of which the distinctive Celebes form, Chestnut-naped Imperial Pigeon .This is a forest species; it builds a stick nest in a...
  
   (Ducula aenea)
• Spectacled Imperial Pigeon (Ducula perspicillata)
• Elegant Imperial Pigeon (Ducula concinna)
• Pacific Imperial Pigeon (Ducula pacifica)
• Micronesian Imperial Pigeon (Ducula oceanica)
• Polynesian Imperial Pigeon (Ducula aurorae)
• Marquesan Imperial Pigeon
  Marquesan Imperial Pigeon
  The Marquesan Imperial Pigeon or Nukuhiva Pigeon is a pigeon which is endemic to Nuku Hiva in the Marquesas Islands, French Polynesia. This pigeon is only found in some valleys in the western part of that island...
  
   (Ducula galeata)
• Red-knobbed Imperial Pigeon (Ducula rubricera)
• Spice Imperial Pigeon (Ducula myristicivora)
• Island Imperial Pigeon (Ducula pistrinaria)
• Christmas Imperial Pigeon (Ducula whartoni)
• Pink-headed Imperial Pigeon (Ducula rosacea)
• Grey Imperial Pigeon (Ducula pickeringii)
• Cinnamon-bellied Imperial Pigeon (Ducula basilica)
• Purple-tailed Imperial Pigeon (Ducula rufigaster)
• Finsch's Imperial Pigeon (Ducula finschii)
• Rufescent Imperial Pigeon (Ducula chalconota)
• Barking Imperial Pigeon (Ducula latrans)
• Chestnut-bellied Imperial Pigeon (Ducula brenchleyi)
• Vanuatu Imperial Pigeon (Ducula bakeri)
• Goliath Imperial Pigeon (Ducula goliath)
• Pinon's Imperial Pigeon (Ducula pinon)
• Black Imperial Pigeon (Ducula melanochroa)
• Collared Imperial Pigeon (Ducula mullerii)
• Zoe's Imperial Pigeon (Ducula zoeae)
• Mountain Imperial Pigeon (Ducula badia)
• Dark-backed Imperial Pigeon (Ducula lacernulata)
• Timor Imperial Pigeon (Ducula cineracea)
• Pied Imperial Pigeon (Ducula bicolor)
• Silver-tipped Imperial Pigeon (Ducula luctuosa)
• Torresian Imperial Pigeon (Ducula spilorrhoa)
• Yellowish Imperial Pigeon (Ducula subflavescens)
• Henderson Imperial Pigeon (Ducula harrisoni) (extinct)