参考
- ↑ http://www.birdsnways.com/wisdom/ww15eii.htm
- ↑ http://www.birdsnways.com/wisdom/ww15eii.htm
- ↑ http://www.birdsnways.com/wisdom/ww15eii.htm
- ↑ http://www.birdsnways.com/wisdom/ww15eii.htm
- ↑ http://www.birdsnways.com/wisdom/ww15eii.htm
- ↑ http://www.birdsnways.com/wisdom/ww15eii.htm
- ↑ https://lafeber.com/pet-birds/cockatiel-behavior-brilliantly-baffling/
- ↑ https://lafeber.com/pet-birds/cockatiel-behavior-brilliantly-baffling/
- ↑ https://lafeber.com/pet-birds/cockatiel-behavior-brilliantly-baffling/
- ↑ http://www.birdsnways.com/wisdom/ww15eii.htm
- ↑ https://lafeber.com/pet-birds/cockatiel-behavior-brilliantly-baffling
- ↑ https://lafeber.com/pet-birds/cockatiel-behavior-brilliantly-baffling/
- ↑ https://lafeber.com/pet-birds/cockatiel-behavior-brilliantly-baffling/
- ↑ http://www.goodbirdinc.com/parrot-profiles-cockatiel.html
- ↑ http://www.birdsnways.com/wisdom/ww15eii.htm
- ↑ http://www.birdsnways.com/wisdom/ww15eii.htm
- ↑ http://www.birdsnways.com/wisdom/ww15eii.htm
- ↑ http://www.cockatiel.com/index-4.html
- ↑ http://www.cockatiel.com/index-4.html
- ↑ http://www.cockatiel.com/index-4.html
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