FINCHforum

http://www.heatal.com/birds/solar_heater_for_birds.html

http://eggheater.tripod.com/solar_heater_for_birds.html

there are ones that can be run on batteries if power fails (top set of heaters:

http://www.heatal.com/birds/bird_heaters.html

Cindy,
Those are great ideas! I may have to buy some... Thanks.

They come in different sizes...I may get a few of the small meant for single cages for weaned and young hookbills!!