Flight behaviour Sample Clauses

Flight behaviour. Mortality of birds due to collision with structures has been reported in other parts of the world (e.g., Anonymous 1930, Xxxxxx 1966, Xxxxx 1979, Xxxxx et al. 1980). For this reason the potential hazards to birds of the Shenzhen Western Corridor were investigated through literature review and discussions with overseas specialists. These investigations

Flight behaviour. Most birds recorded flying during high tides (91% of total birds) and low tides (65%) were ardeids, the dominant bird group on the intertidal mudflats. Recorded flight heights ranged from 1–60 m during high tides, and from 3–30 m during low tides. Only two birds were seen flying at altitudes greater than 48 m above the water during high tides, and both were Black-eared Kites Milvus lineatus. Birds tended to fly within 200 m from the coastline during both high tides and low tides. The distribution of flight heights during high tides and low tides is shown in Charts 3.2 & 3.3. No prominent modal flight height was observed, but 82% and 92% of observed birds flew lower than 15 m in high tides and low tides respectively (Chart 3.4). This compares to the approximate height of the underside of the proposed bridge (13 m).