Juvenile budgies: ECU of baby budgies in nest inside hollow tree, mother feeds one of the babies in the background; MCU of adult budgie sitting on hollow tree, juvenile budgie sticks its head out of hole; juvenile budgie watches caterpillar crawl by the entrance to its nest; MCU of juvenile sticking its head out of tree; MCU of adult feeding juvenile by regurgitating food; MLS of adult feeding two juveniles at opening to tree hollow.