Budgerigar (Melopsittacus undulatus)

Containing taxa: Animalia » Chordata » Osteichthyes » Sarcopterygii » Tetrapoda » Diapsida » Archosauria » Aves » Neoaves » Psittaciformes

Photoreceptors:
Receptor Opsin λmax Filter λmax Filter λ50% Recep. λmax
Red cone564nm530nm590nm602nm
Double cone564nm408nm450nm564nm
Green cone 2505nm490nm540nm549nm
Green cone 1505nm475nm535nm544nm
Rod509nm509nm
Blue cone444nm408nm440nm459nm
Vio/UV cone360nm  361nm


Opponent processes:
Description (+) Terminus (-) Terminus Mode
Luminance (photopic)
Double cone   Photopic
Luminance (scotopic)
Rod   Scotopic
Orange-Green
605nm - 581nm - 547nm
 
Red cone Green cone 2
Green cone 1
Photopic
Green cone 2-Green cone 1
557nm - 543nm - 528nm
 
Green cone 2 Green cone 1 Photopic
Green-Blue
547nm - 520nm - 459nm
 
Green cone 2
Red cone
Green cone 1
Blue cone Photopic
Blue-UV
459nm - 425nm - 361nm
 
Blue cone Vio/UV cone Photopic

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Notes and References:

Bowmaker, J. K., Heath, L.A., Wilkie, S. E., & Hunt, D. M. (1996) Visual Pigments and Oil Droplets from Six Classes of Photoreceptor in the Retinas of Birds Vis. Res., 37(16) pp. 2183-94

Hart, N. S. (2001) The Visual Ecology of Avian Photoreceptors. Progress in Retinal and Eye Research Vol. 20, No. 5, pp. 675 to 703, 2001

Goldsmith T.H., Butler B.K. (2005) Color vision of the budgerigar (Melopsittacus undulatus): hue matches, tetrachromacy, and intensity discrimination. J Comp Physiol A (2005) 191: 933-951. doi:10.1007/s00359-005-0024-2

Osorio D., Vorobyev M., Jones C.D. (1999) COLOUR VISION OF DOMESTIC CHICKS. Journal of Experimental Biology 202, 2951-2959

Warrant E.J., Nilsson D.-E. (1998) Absorption of White Light in Photoreceptors. Vision Res., Vol. 38, No. 2, pp. 195-207. PII: S0042-6989(97)00151-X

Stavenga D., Smits R.P., Hoenders B.J. (1993) Simple Exponential Functions Describing the Absorbance Bands of Visual Pigment Spectra. Vision Res. 33(8) pp. 1011-1017. doi:10.1016/0042-6989(93)90237-Q



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