, ▁dark ▁stre aks , ▁and ▁white ▁on ▁the ▁thro at . ▁The ▁complete ▁black ▁face ▁mask ▁is ▁sharp ly ▁dem arc ated ▁from ▁the ▁white ▁thro at . ▁It ▁has ▁distinct ive ▁r uf ous ▁under wing - cover ts . ▁It ▁diff ers ▁in ▁all ▁these ▁features ▁from ▁the ▁pal er ▁F . ▁p . ▁cal id us , ▁which ▁is ▁a ▁scar ce ▁winter ▁migr ant ▁to ▁Sri ▁L anka . ▁M ales ▁and ▁females ▁have ▁similar ▁mark ings ▁and ▁pl um age ; ▁apart ▁from ▁size ▁there ▁is ▁no ▁sexual ▁dim orphism . ▁The ▁birds ▁range ▁in ▁length ▁from ▁ 3 8 0 ▁to ▁ 4 4 0   mm . ▁The ▁male ▁is ▁about ▁the ▁size ▁of ▁a ▁house ▁crow ▁( Cor v us ▁splend ens ); ▁the ▁female ▁is ▁larger . ▁ ▁Distribution ▁and ▁habitat ▁The ▁sh a he en ▁is ▁found ▁in ▁South ▁Asia ▁from ▁Pakistan ▁ ▁across ▁to ▁India ▁and ▁Bang l adesh ▁in ▁the ▁east ▁and ▁to ▁Sri ▁L anka , ▁central ▁and ▁south - e astern ▁China , ▁and ▁northern ▁My an mar . ▁In ▁India , ▁it ▁has ▁been ▁recorded ▁in ▁all ▁states ▁mainly ▁from ▁rock y ▁and ▁h illy ▁regions . ▁The ▁sh a he en ▁has ▁also ▁been ▁reported ▁from ▁the ▁And aman ▁and ▁Nic obar ▁Islands ▁in ▁the ▁Bay ▁of ▁Beng al . ▁ ▁Sri ▁L anka ▁The ▁sh a he en ▁is ▁the ▁local ▁resident ▁species ▁of ▁the ▁per egr ine ▁in ▁Sri ▁L anka ▁where ▁it ▁is