Cordyline infestation

[prospect]

I've got two lovely bronze coloured cordylines on my roof terrace but they're being attacked by something.

The leaves are off colour, and the news ones coming through the centre are being eaten by something - the main fronds are disappearing and all that's left is the stringy skeleton.

Any ideas what's causing this and what action I can take? (I do have problems with snails on my hostas....is this similar?). Thanks

[Thunderbird+]

One possible explanation, and I've seen this happen to one of mine, is sparrows pulling out the fibers for nesting material, for some reason they love it, if its not too far gone, you could try wrapping it in chicken wire or cut it back low down, as they often send up new shoots. All the Best.