But he is always on guard.

NEWYORKER: The Party Faithful

They're always on guard.

CNN: Legendary 'zebra whisperer' who tames Queen's horses

Lord Condon knows his battle is continuing, and that he and his staff must always be on guard.

BBC: Odumbe is being investigated by the ICC

Though a great enthusiast for all things crocodile-related - he once seriously considered the logistics of keeping one in his home as a pet - Packham says humans always need to be on their guard when in the vicinity of such animals.

BBC: Who, what, why: How do you fight off a crocodile?