Blue Jay

Cyanocitta cristata

Its name became an insult: by the 1520s a 'jay' was a loud, flashy chatterer, and that slang is the likely source of 'jaywalker.'

Cyanocitta = Greek kyanos 'blue' + kitta 'chattering jay'; cristata means crested. 'Cyanide' comes from the same Greek word for dark blue.