＇Fly-bird-type＇　is　a　half-through　arch　bridge　with　two　cantilever　half-arches.　It　is　a　special　type　of　concrete　filled　steel　tubular　(CFST)　arch　bridge.　Development　and　construction　methods　of　such　type　bridge　are　introduced.　Behaviors　of　the　structures　under　dead　loads　are　investigated.　Some　typical　bridges　are　introduced　as　case　study.　At　last　appointments　on　the　application　and　development　of　such　type　bridge　are　presented.