I had been under the impression that it was ‘warbler’ as well, but after a few careful listens, I must say, you do appear to be correct. Despite your demn strange colonial accent.
Shocking, my dear fellow, simply shocking. I simply must have a cup of tea to calm the nerves now, what what!
Just to add: if it were “warbler” in his non-rhotic RP accent, the first vowel would be slightly elongated, to rime with “Waugh” or “floor”. But it isn’t: it’s a very short “o” as in “cot”.