HIGHAM, T. E.*; DAY, S. W.; WAINWRIGHT, P. C.; Univ. of California, Davis; Rochester Institute of Technology; Univ. of California, Davis: Can peak buccal cavity pressure be used to predict peak fluid speed during suction feeding in fishes? Suction-feeding fish capture prey by rapidly expanding their buccal cavity, which generates a flow of water directed […]

DIAL, K.P.*; TOBALSKE, T.W.; Univ. of Montana, Missoula; Univ. of Portland, Portland: WAIR Flow: Ontogeny of wing aerodynamics during incline running in birds. A survey of diverse avian clades (e.g, Tinamiformes, Galliformes, Columbiformes, and Passeriformes), shows wing-assisted incline running (WAIR) to be a plesiomorphic locomotor behavior. This includes Australian brush turkey chicks that are capable […]

BISHOP, K.L.; Brown University: Kinematics and performance in two species of mammalian gliders, Glaucomys volans and Petaurus breviceps Gliding has evolved independently in at least six lineages of mammals, all resulting in similar morphology and behavior. Investigations of the relationship between kinematics and gliding performance can provide insight into the mechanics of mammalian gliding. In […]

CLARK, Christopher J*; DUDLEY, Robert; UC Berkeley: Effects of tail length on hummingbird top speed, power curve, and parasite drag Hummingbirds (Trochlidae) exhibit enormous variation in their tail morphology and this variation is largely driven by sexual selection. One aerodynamic effect of an elongated tail may be to increase parasite (body) drag, by increasing the […]

TOBALSKE, B.W.**; WARRICK, D.R.; POWERS, D.R.; Univ. of Portland; Oregon State Univ.; George Fox Univ.: Effect of Wing Design on Wake Structure in Small Flying Birds Two species, rufous hummingbird (Selasphorus rufus , 3 g) and zebra finch (Taeniopygia guttata, 16 g) represent opposites with regard to wing design and kinematics among small birds. The […]

BUTLER, L. K.**; ROHWER, S; Burke Museum, University of Washington, Seattle; Burke Museum, University of Washington, Seattle: Correlations between flight demands and the structure of contour feathers in small birds Many studies have illustrated adaptations in birds to reduce the large aerodynamic and metabolic costs of flight, but no study has examined the relationship between […]

MILLER, L. A.; University of Utah: Clap and peel in insect flight with flexible and bristled wings In ‘typical’ insect flight, lift is produced when a leading edge vortex (LEV) is formed and remains attached to the wing and a trailing edge vortex (TEV) is formed and separates from the wing during each stroke. The […]

NAVARA, KJ*; SIEFFERMAN, LM; HILL, GE; MENDON�A, MT; Auburn University, AL; Auburn University, AL; Auburn University, AL; Auburn University, AL: Yolk androgens differ independently of maternal androgens in eastern bluebirds: an experimental study Avian females deposit variable amounts of androgen into the yolks of their eggs, a potentially adaptive mechanism for altering offspring quality. It […]

JOHNSTON, G.I.H.**; MOORE, M.C.; Arizona State University; Arizona State University: Transfer of Maternal Corticosterone to Yolk in Preovulatory and Postovulatory Tree Lizard (Urosaurus ornatus) Eggs Eggs of many vertebrates contain yolk steroids of maternal origin, which can profoundly influence offspring development, growth, and behavior. How and when steroids get into the yolk is still not […]

O’NEAL, D.M.*; PAVLIS, K.; KETTERSON, E.D.; Indiana University, Bloomington; University of Guelph; Indiana University, Bloomington: The Effects of Experimentally Elevated Testosterone on Parental Care in Female Dark-eyed Juncos Experimental elevation of plasma testosterone (T) in male dark-eyed juncos (Junco hyemalis) has been shown to decrease male parental care, but results in an overall fitness increased […]