These shots are my last used of the EF 400mm f/5.6 lens. Will post my 500m lens photos another day. 
anyway! these are a tough subject because they constantly move and wag their tail, Not to mention these bird always stay around low light areas.
The Chestnut-naped Forktail (Enicurus ruficapillus) is a species of bird in the Muscicapidae family. It is found in Brunei, Indonesia, Malaysia, Myanmar, and Thailand. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.
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JKC
