Evolution and Systematics

Evolution

Discussion of Phylogenetic Relationships

View Coraciiformes Tree

Phylogenetic hypothesis taken from Hackett et al. (2008)

Several families traditionally assigned to Coraciiformes have been removed from the order. Bucerotidae and Bucorvidae (hornbills), Upupidae and Phoeniculidae (hoopoes) have been given their own order, Bucerotiformes. Leptosomus (cuckoo roller) is not a roller, and is only distantly related to other traditional coraciiforms. An order that included all these groups would also have to encompass Piciformes and Trogoniformes.

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Functional Adaptations

Functional adaptation

Eyes manage glare: kingfishers
 

Red droplets in the cone cells of kingfisher eyes may allow sight through water or glare by acting as chromatic filters.

     
  "Kingfishers have specialized eyes and excellent eyesight. The retina of each eye has two fovea. The cone cells have a high proportion of red droplets, which may act as chromatic filters, allowing sight through the surface of the water." (Fowler and Miller 2003: 254)
  Learn more about this functional adaptation.
  • Fowler, ME; Miller, RE. 2003. Zoo and Wild Animal Medicine. Philadelphia: W.B. Saunders Co.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
                                        
Specimen Records:706Public Records:250
Specimens with Sequences:430Public Species:59
Specimens with Barcodes:423Public BINs:69
Species:107         
Species With Barcodes:75         
          
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Barcode data

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Locations of barcode samples

Collection Sites: world map showing specimen collection locations for Coraciiformes

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