Some of the most popular bird species kept as pets belong to
the taxonomic order known as passerines. This includes the
canary (Serinus canarius) and the zebra finch (Poephila guttata).
Despite their worldwide popularity, relatively little information
is available on the nutritional requirements of these birds.
The following studies were carried out at the Waltham Centre
for Pet Nutrition (WCPN) to compare the energy and nutrient
intakes and energy metabolizability of these two small passerine species.
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Freya

A varied diet largely made up of live foods will give you the healthiest bird. By live foods we mean vegetables, fruits, and whole grains. Dead foods are foods that don't spoil quickly (i.e. packaged seeds & nuts). That might seem like a simplistic description, but it is actually quite accurate. A healthy, correct diet can add DECADES to your birds' lives.
If you want to learn more you can listen to Dr. Jane Bicks on "Do You Really Know What's In Your Pet's Food?"

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