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@yboulanger2 @AdriaanDokter @Aero_Eco @BiodarProject @AlistairDrake2 @j_chapman2 @STEMwithFreya @gmitch_ecology @RadarAndStuff Here is one way we quantify liftoff of birds https://t.co/7nQGaDFvEK With refinements to the algorithm described here https://t.