Long Tailed Tits

Long Tailed Tits

Observation - Long Tailed Tits - UK and Ireland. Description: These little birds have become regular visitors. I've often noticed the yellow eyelids visible in the first photograph; but the bird in the second picture has red eyelids, and I haven't noticed that before. I've read that the colour is variable with mood

These little birds have become regular visitors. I've often noticed the yellow eyelids visible in the first photograph; but the bird in the second picture has red eyelids, and I haven't noticed that before. I've read that the colour is variable with mood; also that it may be something to do with different races. I really don't know.
Both birds were in the same group, and this was the only one I saw with red eyelids.