Ros, Ivo G. S. Bhagavatula, Partha Lin, Huai-Ti Biewener, Andrew A. Table S1 from Rules to fly by: pigeons navigating horizontal obstacles limit steering by selecting gaps most aligned to their flight direction Variability of local head positioning. navigation;obstacle manoeuvering;bird flight;visual guidance 2016-11-15
    https://rs.figshare.com/articles/journal_contribution/Table_S1_from_Rules_to_fly_by_pigeons_navigating_horizontal_obstacles_limit_steering_by_selecting_gaps_most_aligned_to_their_flight_direction/4233302
10.6084/m9.figshare.4233302.v1