Ruby-topaz Hummingbird - Chrysolampis mosquitus
Colibri rubis-topaze
Comment : The bright ruby-red cap golden-topaz throat/upper chest of this bird is not due to constitutional pigment but is a consequence of the physical structure of the feathers in these areas. These feathers act as refractors diffraction gratings -the refractive elements split white light into its constituent colours (like rain in sunlight creating a rainbow) -most of the colours are then filtered out by the diffractive elements leaving a pure bright irridescent colour. But all this depends on sunlight hitting at just the right angle!
Gallery : © Steve Garvie
Site web : RAINBIRDER
Order : Apodiformes
Family : Trochilidae
Species : Ruby-topaz Hummingbird
Sex : Male
Age : Adult
Plumage : Breeding
Reference: stga49763
Other pictures
date : mai 2006
Geographic data
Country : Trinidad and Tobago (td)
Region : County of Saint George
Place : Asa Wright Nature Centre
Latitude : 10° 43' 48'' North
Longitude : 61° 17' 53'' West
Exif data
Model : Canon 1D mkII
Exposure : 1/750s s
Aperture : f5.6
Focal : 700 mm
Iso : 250
Flash : no
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