Green open space planning as a bird sink in Lima coastal area, Mengwi, Badung. The Reduction of birdbreeding habitat caused the bird population decreases every year. Birds have its ecological functions as partof the food chain and ecosystem balancer, bioindicators of environmental change, help pollinate the plants andas a pest predators. The survey method used is observation, interviews and literature reviews. The planningstages refer to Simond (1983) consist of objectives, inventory, analysis, synthesis and planning. The purposeof Lima Coastal Areas Planning is as a sink area. The results of data analysis showed the suitability of theLima Coastal area as a green open space bird habitat with an area of 18,000 m2 has various types of birds such as turtle birds, erasian sparrows, peking bondol, cow swallow, turtledoves, cucumber merbah, rice kareobirds, rice fields and heron. Green space planning for bird habitats in the Lima Coastal area is arranged basedon the concept of green open space as a sink area for birds. Spatial planning based on its function is dividedinto storage areas, transitions, corridors and education areas. The circulation systems are the circulation ofbirds from the source area to the sink area and the human circulation. Vegetation Planning also needed as asource of feed, nest and breed. Site Planning can be prepared as a bird green space sink in accordance withthe sink and source concept so that it can be developed into a core area of sink protection, transition, corridorand education area.