UVA:
Humans have 3 cones in our retina and birds, reptiles and amphibians has four. This fourth cone is sensitive to emissions in the UVA and is the “primary colour” that makes up the birds entire range of visible light. Birds need UVA for the following:
• Sex recognition. UV reflection of the plumage can differentiate sexes.
• Food selection. Ripeness of foods assessed from their UV reflection.
• Food intake.
• Comforting behaviour.
The lack of UVA in light contributes to psychological problems and associated behaviours, such a feather plucking.
UVB:
UVB regulate and synthesize Vitamin D3 which allows parrots to absorb the calcium they need from their diet necessary to maintain healthy bones and keep their beak in good shape. It also helps with the growth of healthy feathers as well as regulating molting and the reproductive cycle in parrots.
When birds preen their feathers they spread oil over them from their Uropygial gland situated at the base of their tail. This oil undergoes a chemical reaction when it is met with the UVA and UVB rays of sunlight. The reaction changes the oil in to vitamin D3. When the bird preens again, they ingest the vitamin D3 from their feathers. Vitamin D3 is necessary for animals, and humans, to be able to extract calcium from their diet through their digestive tract.
UVB is especially important for African Greys because they need lots of calcium otherwise they develop hypocalcemia - brittle bones.
Here is a very extensive study: http://reptileuvinfo.com/docs/cal-met2.pdf
Mega-ray and Zoomed makes UV lights for parrots. All UV lights emits UVA but only emits UVB if it is written on the box, just something to look out for. Dont buy the spiral kind, it causes eye infections in reptiles and I am sure that it has not been tested with parrots yet, rather safe than sorry. The light must be replaced every 6 months and it is crucial that it hangs the correct distance from the cage.
The way that I figure things out is, where does your parrot come from? If he comes from a place where there is lots of sunlight then he will need a UV light or direct sunlight for optimum health.
Humans have 3 cones in our retina and birds, reptiles and amphibians has four. This fourth cone is sensitive to emissions in the UVA and is the “primary colour” that makes up the birds entire range of visible light. Birds need UVA for the following:
• Sex recognition. UV reflection of the plumage can differentiate sexes.
• Food selection. Ripeness of foods assessed from their UV reflection.
• Food intake.
• Comforting behaviour.
The lack of UVA in light contributes to psychological problems and associated behaviours, such a feather plucking.
UVB regulate and synthesize Vitamin D3 which allows parrots to absorb the calcium they need from their diet necessary to maintain healthy bones and keep their beak in good shape. It also helps with the growth of healthy feathers as well as regulating molting and the reproductive cycle in parrots.
When birds preen their feathers they spread oil over them from their Uropygial gland situated at the base of their tail. This oil undergoes a chemical reaction when it is met with the UVA and UVB rays of sunlight. The reaction changes the oil in to vitamin D3. When the bird preens again, they ingest the vitamin D3 from their feathers. Vitamin D3 is necessary for animals, and humans, to be able to extract calcium from their diet through their digestive tract.
UVB is especially important for African Greys because they need lots of calcium otherwise they develop hypocalcemia - brittle bones.
Here is a very extensive study: http://reptileuvinfo.com/docs/cal-met2.pdf
Mega-ray and Zoomed makes UV lights for parrots. All UV lights emits UVA but only emits UVB if it is written on the box, just something to look out for. Dont buy the spiral kind, it causes eye infections in reptiles and I am sure that it has not been tested with parrots yet, rather safe than sorry. The light must be replaced every 6 months and it is crucial that it hangs the correct distance from the cage.
The way that I figure things out is, where does your parrot come from? If he comes from a place where there is lots of sunlight then he will need a UV light or direct sunlight for optimum health.