Great tit

Wow, lot of great comments are here. Thank you for correcting you guys. :D These babies live in Korea National Arboretum.

mine was a suggestion, FaredinAliyevski. :))
very cute babies, YJ Lim! :)))

But they are definitely not coal tits, Pedro is right in that. I guess these chicks could be Parus cinereus, especially with the white patch on the neck which is seen on the P. major and P. cinereus. And if you say P. major does not exist in South Korea then we have narrowed it down but Wikipedia says that P. major is also a species of South Korea..

:)

Well, I guess you are right theh, Harum Koh!

Parus minor. (major isn't in Korea, I suppose.)

Thanks for correcting Pedro.

These guys are great tits, not coal tits. Coal tits have a white patch on the back of their head which these don't show. (http://thumbs.dreamstime.com/z/coal-tit-...)
The white patch seen on this is located on the neck, which is common amongst all Great tits (http://farm3.staticflickr.com/2718/57506...).

Yes, these cute chicks are coal tits so just complete your spotting with the details.

Thank you. They're Coal Tit (Periparus ater) babies I think.

Excellent spotting. Would love to know what sort of birds they are.