Protect her from draughts before adding heat
A Bourke's parrot copes with cold winter weather best when her cage sits somewhere still, so move it away from windows, letterboxes, exterior doors, and the cold pool of air that gathers at floor level overnight. These gentle Australian grass parrots roost low and feed on the ground in the wild, which makes the draughty bottom of a room the worst place for her cage in a cold snap. An interior wall, raised off the floor, gives steadier air than any heater pointed at the bars. Check the spot at her most active times, dawn and dusk, by sitting beside the cage yourself; if you feel moving air on your face, so does she.
Keep warmth steady rather than dramatic
A Bourke's parrot is stressed more by temperature swings than by a modest, constant coolness, so aim for a room that holds one even temperature day and night instead of blasting heat while people are awake. If extra warmth is needed, a bird-safe heater warming the room is safer than a lamp or heated perch aimed at one side, which can overheat a small bird that dozes against it. Never use scented candles, oil burners, or fume-producing heaters near her, because a bird's breathing is far more sensitive to airborne fumes than yours. Covering part of the cage at night traps still air around her roost without sealing away ventilation.
Give her a sheltered sleeping corner
A Bourke's parrot rests warmly in winter when she can choose a protected corner, so arrange a covered section of cage, a snug roosting spot out of the room's airflow, where she can sleep fluffed lightly without being chilled. Bourke's parrots are famously placid and will not compete or complain loudly when uncomfortable, which means a cold bird may simply grow quieter while her keeper assumes all is well. Offer the shelter well before the coldest nights so it is familiar furniture, not a strange new object introduced during a freeze. Watch that she still emerges eagerly at dawn and dusk to feed and fly, her natural busy hours.
Guard food and water against the cold itself
A Bourke's parrot needs her water checked twice daily in very cold weather, because a drinker in an unheated room can chill severely or ice over at the spout while still looking full. Seed keeps well, but soft foods and greens left in a cold, damp cage spoil in ways that are easy to miss, so serve smaller amounts and remove them promptly. A slightly richer seed offering and a bathing chance on milder midday hours help her maintain condition and feather quality through the season. If she bathes, let her dry in the warm room well before the night cover goes on.
Know the winter signs that mean a vet
A Bourke's parrot needs prompt veterinary attention when cold stress outlasts a warm room's help, so act on sustained fluffing with closed eyes, sitting on the cage floor, tail bobbing as she breathes, or a full day of ignoring food. This species hides illness quietly, so a Bourke's that looks merely sleepy at midday, when she would normally rest only lightly, deserves a same-day call rather than another night of waiting. Keep her warm and undisturbed on the way to the appointment, in her small travel cage with a cover. Sharing her winter watch-list through KinsLe Family Sharing means whoever is home that day checks the same signs and care notes, not a version they half-remember.