Java Sparrow, Canary & Society Finch

Egg binding

SignsFemale crouches on the floor, swollen vent area, straining, rapid breathing, dragging a leg

PreventionRemove nest and nesting material to suppress hormonal behavior. Keep daylight to 12 hours or less. Supply cuttlebone/oyster shell grit and calcium

Coccidiosis

SignsWatery or bloody droppings, weight loss, fluffed feathers; common in society finches and Java sparrows

PreventionFecal test when acquiring a bird. Remove droppings daily, keep bedding clean. Quarantine new birds for 2 weeks

Trichomoniasis

SignsWhite masses in the mouth or throat, dropping food, difficulty swallowing, yawning-like motions, weight loss

PreventionSpread by beak-to-beak feeding from infected birds. Test on arrival; wash water dishes daily

Air sac mites

SignsCommon in canaries. Clicking sound when breathing, open-mouth breathing, tail bobbing, loss of voice

PreventionAvoid contact with infected birds. See a vet early for deworming as soon as you notice abnormal breathing sounds

Vitamin B1 deficiency / malnutrition

SignsWobbling, leg paralysis, unable to fly, dull plumage, feathers not growing in

PreventionNot seed alone: give pellets, greens and oyster shell grit daily. Use vitamin supplements correctly

Swollen feet / gout

SignsRed, swollen toes, white lumps, cannot grip the perch, holds one foot up

PreventionProvide natural-wood perches of different thicknesses. Avoid high-protein food to reduce strain on the kidneys

Leg fracture / dislocation

PreventionCheck that feet cannot get caught in perch gaps or frayed threads. Use a night light in case of night frights

First aidDo not handle. Line a small box with a towel, remove perches and keep warm. Do not splint yourself; see a vet the same day

Thread tangled around the foot

PreventionKeep frayed cloth, towels and jute-rope items out of the cage. Check nests for loose threads

First aidCarefully cut only the thread with small scissors. If the foot is swollen or discolored, see a vet immediately (risk of necrosis)

Collision / bruising

PreventionMark windows and mirrors when the bird is out. Close lids on water containers and toilets

First aidRest 30 minutes in a dark, warm box. Wobbling, head tilt or bleeding: see a vet immediately

Bleeding nail or feather

PreventionTrim nails short of the blood vessel. Do not force-handle pin feathers (new feathers) during molt

First aidPress with gauze for several minutes; apply styptic powder or cornstarch. If it will not stop or there is a lot of blood, see a vet

Psittacosis

RouteInhaling dried droppings or dust; beak-to-mouth feeding

PreventionMist to dampen before cleaning and wear a mask. No beak-to-mouth feeding. Tell your doctor you keep birds if you get a fever or cough

Salmonellosis

RouteOral infection via hands that touched droppings or dishes

PreventionWash hands after care. Disinfect the sink when washing bird dishes in the kitchen

Cryptococcosis

RouteInhaling mold spores growing on droppings

PreventionRemove droppings daily and keep them from getting damp. Immunocompromised people should avoid cleaning

Bird allergy

RouteInhaling feather dust and dried-dropping dust

PreventionVentilation, air purifier, frequent cleaning. See a doctor for a lingering cough

Food

• Finch seed mix (with hulls) or pellets twice a day
• Small daily amounts of oyster shell grit, komatsuna greens and pea shoots
• Remove husks and refill daily. Watch for a dish that is only husks, meaning the bird is not eating

Water

• Change every morning, twice a day in summer. Use a drinking dish separate from the bath
• Place the water dish where droppings and husks cannot fall in

Toys & play

• A swing and a few toys with bells. Remove broken toys
• A bath dish is a Java sparrow's greatest joy; change it daily
• Jute rope tangles feet. Replace frayed toys

Nest, bed & hideout

• Do not put in a nest except for breeding, to suppress hormonal behavior
• Two or three natural-wood perches of different thicknesses

Bedding & litter

• Newspaper or paper under the floor grate, changed daily
• Wash the floor grate weekly; check droppings daily
• Do not use sand or pet sheets (the bird chews them)

Cage / housing material

Plated metal with no flaking paint or rust. Bamboo cages easily become unhygienic

Size & space

Rectangular cage about 35–45 cm wide. One bird per cage; society finches can be kept in pairs

Layout

• Place perches at different heights so droppings do not fall into food
• Food and water near the perch, out of the drop zone
• Cover at night and give 12 or more hours of dark rest

Placement notes

• Avoid kitchen fumes, direct sunlight and air-conditioner drafts
• Against a wall at a person's eye level, in a quiet spot

Exercise, free-roam & walks

• Java sparrows: 30 minutes to 1 hour out of the cage daily, with windows and doors closed and you in the room
• Canaries and society finches: give enough cage space to fly
• Before letting the bird out, put away water containers, small objects and houseplants

Temperature & humidity

Temperature25–28°C (28–30°C for young, sick or elderly birds)

Humidity50–60%. Humidify in the dry season

Summer & winter

• Summer: avoid direct sun, keep below 28°C, keep bath water clean
• Winter: heater plus thermometer, and a cover. Very sensitive to cold, so start heating early

Nail trimming

Hold up to the light and trim only the tip beyond the blood vessel, once every 1–2 months. Java sparrow nails grow fast and catch on threads

Brushing, skin & coat care

Not needed. Java sparrows bathe daily and canaries several times a week to keep feathers clean. Boost nutrition during molt

Other care

The beak wears naturally; see a vet for misalignment or overgrowth. Flaky leg scales may indicate mites or gout

Protection from predators

• Never let the bird out in the same room as cats, dogs or ferrets
• Windowsills and balconies: risk of crows, snakes and escape
• Keep out mosquitoes and red mites (blood-sucking mites) with screens and cleaning

Foreign-body ingestion

May swallow thread, beads, metal fragments or rubber bands. Tidy up before letting the bird out; swallowed metal can cause poisoning, so see a vet urgently

Being stepped on

Birds habitually come down to the floor. Shuffle your feet while the bird is out, and always check where it is before standing up or sitting down

Getting pinched

Crushing deaths in doors, sliding doors and under cushions are common. No opening or closing doors while the bird is out; always know where it is

Falls

A light bird, but bruising can cause sudden collapse. Do not place on slippery tables or high shelves. After a fall, keep dark and warm and watch 30 minutes; see a vet immediately if anything is wrong

Escape

Always close windows and the front door. If it escapes, call its name and put the cage outside. Report immediately to the police, public health center and social media, and file a lost-pet report

Safe release procedure

1. Java sparrows bite hard. Stop moving and breathe out
2. With the other hand, gently press the base of the beak to open the mouth
3. Return to the cage and quietly keep your distance
4. Review the cause: hormones, territory, fear

After the release

Wash the wound under running water and disinfect. See a dermatologist for swelling or fever. Discuss hormonal-season aggression with your vet

What to tell the vet & what to bring

Weight records, the soiled paper, type of food, when symptoms began. Confirm in advance that the clinic treats small birds

Checking consciousness, breathing & heartbeat

• Breathing: watch the chest rise and fall, open mouth, tail bobbing
• Heartbeat: place a finger on the chest and feel for rapid vibration
• Consciousness: call its name, check for a response and whether it opens its eyes

Stopping bleeding

• Press the site with clean gauze for several minutes
• Nail or feather shaft: apply styptic powder or cornstarch
• If it will not stop or blood spreads over the body, transport while maintaining pressure

Transport

• Small plastic carrier lined with a towel, warmed with a hand warmer
• Dark and quiet, no shaking, no direct car heating or air conditioning on the bird