There are many items, in addition to plants that are toxic to birds, including foods, metals, solvents and other compounds. The lists below have been gathered from various sources and are by no means complete. Print them out and keep them for reference.

Alcohol & alcoholic beverages

Avocado (skin, pit)

Caffeine

Chocolate

Cigarette Smoke

Coffee

Corn (stored in humid area)

Highly salted foods

Mushrooms

High Oxalic acid foods (spinach, rhubarb)

Raw peanuts in shell (poorly stored)

Seeds (in quantity apple, apricot, bitter almond)

Seeds (in quantity cherry, peach, pear, plum)

Soft Drinks (with caffeine or colas)

Tea

Wines

Heavy Metals

Arsenic compounds

Cadmium

Batteries

Paints

Lead - (symptoms: seizures, falling from perches)

Batteries

Floor tile

Galvanized wire

Hardware cloth

Insulation (of equipment)

Lead weights (toys, drapes, fishing equip) Linoleum

Mirrors (silvering in back)

Paints and paint removers

Stained glass

Wires and cables (electrical)

Wrapping foil (bottles, packages)

Mercury

Thermometers

Levels

Zinc - (symptoms: falling from perches)

Brass

Chrome

Paints and paint removers (even if lead free)

If you need to paint - A No 'VOC' paint is best where birds are concerned. They might be a little higher in cost, but not much. It is a little more inconvenient to find/buy as you usually have to go to a paint store as most general retailers like Home Depot, Lowes, etc don't usually carry them.  (You might be able to get them to order some for you.)  Isn't your bird worth it? 'VOC' stands for "volatile organic compounds". They are what produce a breathable gas when applied, causing the smell and breathing problems in sensitive people and birds. 

NO VOC:
  Glidden-
Lifemaster 2000
  Sherwin-Williams-
Harmony
  
  LOW VOC:
  Behr:
Premium Plus
  Benjamin Moore®-
Waterborne Satin Impervo® (314),
Waterborne Urethane (M73),
Waterborne Polyamide Epoxy (M42),
Moorcraft Super Spec® Acrylic Epoxy (256).
All of these new products are low odor and have low VOC content.
  Duron-
Genesis Odor-Free
  Glidden:
Spread 2000
  Sherwin-Williams:
Duration Home Interior Latex

Galvanized wire (often used for aviaries) Pet birds spend allot of time climbing on the wire    - breeder birds do not

Nuts, bolts and nails

Compounds

Ammonia

Antifreeze

Ant Paste

Asbestos

Auto products

Bathroom cleaners

Bleach

Boric acid

Camphophenique

Carbon Monoxide

Charcoal Fluids

Corn & wart removers

Deodorants

Detergents

Diazinon

Disinfectants

Drain Cleaners

Felt tip markers

Flea Products

Floor Polish

Formaldehyde

Gasoline

Glues (epoxy, models, super)

Gun Cleaners

Hair dyes & sprays

Herbicides

Insecticides

Iodine

Kerosene

Lighter Fluid

Lye

Matches

Metal cleaners & polishes

Moth Balls

Muriatic acid

Nail polish & remover

Oven cleaner

Paint, thinners, removers

Permanents & hair dyes

Pesticides

Photography solutions

Polishes (floor, furniture, shoe)

Shaving Lotion

Shellac & varnishes

Solvents & spot removers

Spray starch

Suntan oils & lotions

Teflon fumes

Wax

Window cleaners