My partner and I inherited a parrot a few months ago and are doing our best to take good care of him. He's a middle-aged caique. Temperatures are beginning to drop here in northern USA and we're concerned that too low temperatures, or too unsteady temperatures, will be bad for this bird's health.
The indoor temps the bird could be exposed to would probably be 60-65dF lowest. If it got lower, as the house might rarely down to 50dF, the bird would certainly be in a warmer, insulated area. The bird is equatorial - their natural range is tropical Brazil - so we expect him to biologically be tuned to ~75dF give or take 5dF. Outdoors where we are it can be below freezing for over a week straight.
We installed two space heaters designed to be in bird cages - a wall-mounted heater and a heated perch. Our bird doesn't like standing on the perch but at night he does stand nearby both the heaters. During the day he'll hang out elsewhere in his cage. We felt these heaters were safe to leave on more or less 24/7 since they are designed for that purpose.
Even with these heaters, we're concerned the room he's in isn't warm enough. Our current residence is hard to keep heated but we're moving soon so that should help. Still we wonder: during the day, while we're away or even while we're home and if our bird is out of his cage playing in another room, what is a safe way to ensure our bird is warm enough during the winter?
We opt for space heater fans nearby him when we're home with him. That keeps the room his cage is in, or the area he's in if elsewhere, pretty warm. The space heater has a setting to shut off once the room reaches a set temperature. The concern with this method is two-fold: 1) we don't think it's safe leaving the space heater on when we're not home; and 2) we worry that the ups and downs in temperature that come from a space heater turning on and off could be bad for our bird's health.