![]() Despite the rapid deceleration in this configuration, the bird is still flying at moderately high speed, which prevents it from stalling and also allows it to spiral back for another attack if needed. 5 and is in agreement with previously broadcasted live recording 6, 7, 8. This observation was confirmed from the live recordings also reported in ref. ![]() During the M-shape the arm opens up further into the horizontal plane and the primary feathers are aligned with the axis of the bird to form an M-shaped planform when viewed from the top. In C-shape the arms are slighly untucked, creating a cavity between the body and the primary feathers, which are oriented vertically. 4) and the M-shape (the focus of this manuscript). The success of the attack largely depends on the manoeuvrability during the second phase of the stoop, when the bird 1 starts to pull out from the dive, while undergoing two important morphological transformations, namely the cupped-wing shape (C-shape, detail presented in ref. Within the initial phase of the stoop it adopts a ‘teardrop’ shape (T-shape) where the wings are folded and feathers tucked in a streamlined shape, which is intuitively the lowest drag configuration. While soaring, the falcon first climbs with the wings completely stretched out to increase lift, collected from vertical columns of rising air known as ‘thermals’ 3. Diving from high altitude is necessary to build-up such speeds. These findings could help in improving aircraft performance and wing suits for human flights.ĭuring stoop, peregine falcon ( Falco peregrinus), can dive at 39 ms −1 1 to 51 ms −1 2, making it the world’s fastest animal. A vortex pair with a sense of rotation opposite to that from conventional planar wings interacts with the main wings vortex to reduce induced drag, which would otherwise decelerate the bird significantly during pull-out. The stronger wing and tail vortices provide extra aerodynamic forces through vortex-induced lift for pitch and roll control. These vortices enhance mixing for flow reattachment towards the tail. Both experiments and simulations on life-size models, derived from field observations, revealed the presence of vortices emanating from the frontal and dorsal region due to a strong spanwise flow promoted by the forward sweep of the radiale. Here we demonstrate that the superior manoeuvrability of peregrine falcons during stoop is attributed to vortex-dominated flow promoted by their morphology, in the M-shape configuration adopted towards the end of dive. “It takes everyone, our team, collaborators, and supporters, to achieve the kind of success The Peregrine Fund is known for and I’m excited about our future together.The peregrine falcon ( Falco peregrinus) is known for its extremely high speeds during hunting dives or stoop. Our founders, leaders, and team members have set a trajectory for The Peregrine Fund that we intend to not only maintain but also enhance in order to meet the many challenges we face in conservation,” says Parish. “I am honored and humbled by the opportunity to serve this great organization in a new capacity. I know that Chris will be a great leader to guide The Peregrine Fund into the future,” says Hall. “I’ve known Chris for a long time and I could not be more pleased with the way this process has unfolded. Dale Hall has served as the interim President and CEO while the board conducted the search to fill the position. Rick Watson, who worked for the organization for more than 30 years and retired from the leadership role in July of this year. ![]() The organization has a staff of over 100 conservation experts worldwide, conducting 25 projects on six continents, and annually raises over $6 million in support of raptor conservation and research. That success encouraged the organization to expand its focus, and apply its experience and understanding to raptor conservation efforts on behalf of more than 100 species in 65 countries worldwide. The Peregrine Fund was founded in 1970 to restore the Peregrine Falcon, which was removed from the U.S. We are honored and thrilled that Chris accepted this position and are excited to work with him to position the organization for another 50 years of conservation success.” “His passion for raptor conservation and The Peregrine Fund is unequaled. “Chris has served as a leader within the organization for many years and he embodies all of the qualities that make The Peregrine Fund one of the leading wildlife conservation organizations worldwide,” said Carter Montgomery, Chairman of The Peregrine Fund Board of Directors. Additionally, Chris worked with partner organizations to form the North American Non-lead Partnership, which now includes more than 40 partners across the United States. Parish began his career with The Peregrine Fund in November 2000 and has led The Peregrine Fund’s California Condor recovery program in northern Arizona and southern Utah.
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