Ƙwaƙwalwar ɗan Amurka wani babban nau'in kyankya ne, wanda a kimiyance ake kira Periplaneta americana, wanda asalinsa ne a Afirka amma ya zama kwaro da ya yaɗu a sassa da dama na duniya, ciki har da Amurka. Ana kiranta da kyankyasai na Amurka saboda yaɗuwarta a cikin nahiyar Amurka, amma kuma ana kiranta da bug ɗin ruwa, bug palmetto, ko bug na ruwa mai tashi. An san kyankyasar Amurka da launin ja-launin ruwan kasa, dogayen eriyansa, da kuma iya tashi daga nesa. An dauke shi a matsayin kwaro na gida saboda yana iya gurɓata abinci da yada cututtuka.