Zinc and Parrots - Article from the Proceedings of the International Aviculturists Society, January, 1997. Features details about zinc biology and bird cages. - http://www.funnyfarmexotics.com/IAS/Zn.htm
Toxic Metals Weigh Heavy on Birds - Article discusses the effects of mercury and lead on wildlife. From Science and the Environment Bulletin. - http://www.ec.gc.ca/science/sandejan02/article1_e.html
Toxicoses in Birds - Discusses chocolate, alcohol, salt, and avocado toxicity. Including contaminated foods. - http://www.oldworldaviaries.com/text/miscellaneous/toxicoses.html
Why Caffeine is Toxic to Birds - Article discusses the effect of certain foods, such as chocolate, on the avian nervous system. - http://www.multiscope.com/hotspot/caffeine.htm
Heavy Metal Poisoning in Birds - Article that describes the toxic effect of heavy metals such as lead, brass, copper, and zinc. - http://www.multiscope.com/hotspot/metals.htm
The Silent Killer - Discusses polytetraflouethylene (teflon fumes) which are deadly to birds. - http://theaviary.com/teflon.shtml
Teflon poisoning: The silent killer - Vet describes PTFE toxicity in birds, which is often fatal, caused by cookware and parts made with teflon or a non stick coating. By Old World Aviaries. - http://www.oldworldaviaries.com/text/styles/teflon.html
Paint, Lead, & Zinc - Describes how paint fumes, lead, and zinc in items can be lethal to your birds. From Quaker Parakeet Society. - http://qp-society.com/qpserc/paintzinc.html
Lead Poisoning in Birds - Veterinarian describes the symptoms and treatment for this potentially fatal condition. - http://www.heidihoefer.com/pages/birds/lead_poison_bird.htm