![]() In each location, they’d set a five-minute timer and jot down every bird they could see or hear. that had been greenlined, redlined or excluded from the risk assessment maps. Between 20, twice during the non-breeding season from October to March, researchers conducted bird surveys across 132 locations in 33 residential communities in L.A. Those maps were among the starting points for the authors. ![]() “Even though those practices explicitly are outlawed, this city is an accretion of its history, and it doesn’t just go away because time has passed.” “The legacy of our discriminatory practices is still written into the city itself,” said study co-author Travis Longcore, an adjunct professor with the UCLA Institute of the Environment and Sustainability. Forest birds such as yellow-rumped warblers, band-tailed pigeons, acorn woodpeckers and black-throated gray warblers are more abundant in these areas, researchers found. Greenlined areas, on the other hand, have more trees and vegetation cover, which attract more birds and a greater diversity of them. As a result, these areas have less bird biodiversity and larger populations of synanthropic birds - species adapted to dense urban environments such as house finches and sparrows, European starlings, common pigeons and northern mockingbirds. ![]() Historically redlined nonwhite communities, such as Boyle Heights, have less tree canopy and greater housing density than greenlined neighborhoods. ![]()
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