Thread: He's about as fly as they make 'em, you bet!

Hola a todos. ¿Cómo se traduciría la frase del título en el siguiente texto?:
"He's reconnoitering!" whispered my companion with a hoarse chuckle. "He's afraid—and I know what he's afraid of. He won't be caught in a trap if he can help it, the old 'un. He's about as fly as they make 'em, you bet!"

Gracias por vuestra ayuda.

En el texto arriba usaria la traduccion como "astuto" o "ingenioso."