In the yard outside, his budgerigars rattle at their rusty cages.

庭院里，他的虎皮鹦鹉在锈迹斑斑的笼中嘎嘎哀鸣。

Other social creatures like guinea pigs and budgerigars are also covered by this legislation.

其他社会性生物，比如豚鼠和虎皮鹦鹉，也在法规保护范围内。

Then I tried budgerigars, because I'd heard that budgerigars reproduce really quickly; unfortunately, the rats got in and ate them too.

然后我试着养虎皮鹦鹉，因为我听说它们繁殖非常快，但祸从天降，一群耗子闯入把它们全吃了。

New Zealand-based authors Robert and Brenda Vale base their findings on the amount of land needed to grow food for pets ranging from budgerigars to cats and dogs.

新西兰作家罗伯特和布伦达·威尔通过研究种植宠物(涉及范围从鹦鹉到猫和狗)食物所需的土地数量，得出这项研究结果。