http://eclectusparrots.net/lead.html
http://www.vcahospitals.com/main/pet-health-information/article/animal-health/lead-poisoning-in-birds/881
https://www.beautyofbirds.com/heavymetalpoisoningbirds.html
Batteries
bells with lead clappers
bird toys weighted with lead
ceramics (improperly glazed)
food (contaminated)
galvanized wire
jewelry - costume
hardware cloth
lead shot (shotgun shells)
lead sinkers/weights (fishing, curtains)
fumes from leaded gas
linoleum
mirror backing
paints (old lead based)
plaster permeated with lead paint
putty/caulking compounds
solder (around plumbing etc.)
stained glass windows
Tiffany style lamps
Solder in stained glass
welds (on some wrought iron)
Wine/champagne bottle foil
Some Bell Clappers including those found in some bird toys
Lead weights - often inserted in the bottom of curtains
Lead based paints ñ especially prevalent in older houses
Christmas decorations
Jewellery
Foil from the top of wine bottles
Pewter based products
Some types of ceramics
Mirror backs - including those found in some bird toys
Lead paint chips
Twist ties
Tooth brushes
Plastic / vinyl coverings
Cardboard boxes with dyes
Imported candy / food packaging wrapping/labels
Crystal
Fishing sinkers
Some artist paints
Lead weights / lead hardware
Venetian blinds
Lead-coated household products
Plumbing material
Lead shot
Tile, linoleum
Improperly glazed bowls
Some antiques
Curtain weights, shower curtain weight, fishing sinkers
Tire weights
These are a few examples, you may have other sources in your home.