BARNEY IN BELIZE

Life/death impasse between snake and tree-frog.

Snake had missed getting its jaws around the frog's whole head but would not let go and nor could it swallow it.

Mr Froggy wasn't going to let go of Mr Kaa's throat.

From Wildlife Photographer of the Year, Portfolio 18 (BBC £25) - I think it's this one but there are a few and they don't make it easy to trace.