hormone: that is a messenger chemical that controls various functions. It controls well over 1,000 genes in the human body.


In humans, ultraviolet B light (which is part of normal sunlight) acts on oil in your skin cells and turns it into Vitamin D3. In budgies oil is taken from the preen gland at the base of the tail during preening and is spread all


08 24 BIRD SCENE


over the feathers. This is turned into Vitamin D3 by sunlight and the birds consume it later on during further preening. This is essential for the budgies’ health. Here’s the rub though: ultraviolet B light (UVB) does not travel through glass or clear plastic or fibreglass. Sunlight in general goes through, but not UVB light. So today’s modern


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