Kao-Ani
Kao-ani comes from the word kao, the Japanese word for face, and ani, short for animation. So a "face animation." These bobbing heads were commonly used as forum emoticons, banners and pixel adopts back in the early - mid 00s. There were many various kinds, ranging from animal-based ones to ones inspired by fictional characters. The kao-ani here came from the following sites:
![pixelface](pixelface.gif)
![Anikaos](anikaos_kaoani.gif)
![tako no kanzume](../sprites/bnr8831.gif)
![Bitty's HP](bitty-1.gif)
![Capi Do](banner2.gif)
![Duckyfeet](dflink.gif)
Anime
![Sakura from Cardcaptor Sakura](sakuraCC_sa.gif)
![Shaoran from Cardcaptor Sakura](sy.gif)
![Duo Maxwell from Gundam Wing](lovelyduo.gif)
![Ed from Cowboy Bebop](cowboy_bebop_bounceyed.gif)
![Bill from Pokemon](pokemon_bill.gif)
![Clefairy from Pokemon](image19.gif)
![2ch cat](2ch009.gif)
![Goku from Dragonball Z](image17.gif)
![Naruto from Naruto](naruto.gif)
![Kakashi from Naruto](kakashi.gif)
![Shikamaru from Naruto](shikamaru.gif)
![from Ojamajo Doremi](dodo.gif)
![from Ojamajo Doremi](rere.gif)
![from Ojamajo Doremi](roro.gif)
![from Ojamajo Doremi](mimi.gif)
![Doremi from Ojamajo Doremi](doremi.gif)
![Onpu from Ojamajo Doremi](doremi_onpu.gif)
![Hazuki from Ojamajo Doremi](hazuki.gif)
![Aiko from Ojamajo Doremi](aiko.gif)
![Momoko from Ojamajo Doremi](momoko.gif)
Animals
![Rabbit taking notes](usa-memo.gif)
![Rabbit pointing left](rkohim.gif)
![Rabbit using party popper](rpanright.gif)
![Turtle holding mail](b-merrru-1.gif)
![Cat waving](neco-a_maneki.gif)
![Cat winking](neco_h.gif)
![Smiling puppy](wan-1a.gif)
Misc
![Kissing face](00_11_pom_chu.gif)
![Face holding flower](00_27_pom_oiwai.gif)
![Face sweeping with broom](souji.gif)
![Face eating soba noodles](soba.gif)