Little bird, one moving around Baltic capital (10)

I believe the answer is:

budgerigar

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'little bird' is the definition.
'budgerigar' can be an answer for 'bird' (I've seen this before). I'm not certain of the 'little' bit.

'one moving around baltic capital' is the wordplay.
'one moving' becomes 'budger' (to budge is to move along).
'around' means one lot of letters goes inside another.
'baltic capital' becomes 'riga' (capital of Latvia, a Baltic state).
'budger' placed around 'riga' is 'BUDGERIGAR'.

Can you help me to learn more?

(Other definitions for budgerigar that I've seen before include "Popular cage-bird" , "Small parrakeet" , "Australian parakeet" , "Flier" , "something in cage?" .)

I've seen this clue in The Times.

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