The painted redstart Myioborus pictus uses visual displays to flush, pursue, and then capture an abundance of brachyceran Diptera that are equipped with giant fiber escape circuits. This paper investigates the relationships between features of the giant fiber system, the structure of visual stimuli produced by redstarts and their effectiveness in eliciting escape reactions by flies. The results show that dipterous taxa having large-diameter giant fibers extending short distances from the brain to motor neurons involved in escape are flushed at greater distances than taxa with longer and small-diameter giant fibers. The results of behavioral tests show the importance of angular acceleration of expanding image edges on the compound eye in eliciting escape responses. Lateral motion of stimulus profile edges as well as structured visual profiles additionally contribute to the sensitivity of one or more neural systems that trigger escape. Retinal subtense and angular velocity are known to trigger physiological responses in fly giant fiber circuits, but the contributions of edge length and lateral motion in a looming stimulus suggest that escape pathways might also receive inputs from circuits that are tuned to different types of motion. The present results suggest that these several properties of escape pathways have contributed to the evolution of foraging displays and plumage patterns in flush-pursuing birds.

Bacon, J.P., and N.J. Strausfeld (1986) The dipterous ‘giant fibre’ pathway: neurons and signals. J. Comp. Physiol. B, 158: 529–548.
Barber, M.B., D.R. Barber., and P.G. Jabłoński (2000) Painted Redstart (Myioborus pictus). In The Birds of North America (ed. by A.Poole and F. Gill). No. 528, The Birds of North America Inc., Philadelphia, PA.
Basolo, A.L. (1995) Phylogenetic evidence for the role of pre-existing bias in sexual selection. Proc. Roy. Soc. Lond. B, 259: 307–311.
Buschbeck, E.K., and N.J. Strausfeld (1997) Visual motion detection by flies: phylogenetic variations of large field tangential neurons in the lobula plate. J. Comp. Neurol., 383: 282–304.
Buschbeck, E.K. (2000) Neurobiological constraints and fly systematics: how different types of neural characters can contribute to a higher level dipterous phylogeny. Evolution, 54: 888–898.
Endler, J. (1992) Signals, signal conditions, and the direction of evolution. Am. Nat., 139: S125–S153.
Felsenstein, J. (1985) Phylogenies and the comparative method. Am. Nat., 125: 1–15.
Gabbiani, F., M. Chunchui, and G. Laurent (2001) Invariance of angular threshold computation in a wide-field looming-sensitive neuron. J. Neurosci., 21: 314–329.
Gabbiani F., N.F. Hatsopoulos, H.G. Krapp, and G. Laurent (1999b) The many ways of building the collision-sensitive neurons. Trends Neurosci., 22: 437–438.
Gabbiani, F., H.G. Krapp, and G. Laurent (1999a) Computation of object approach by wide-field motion sensitive neuron. J. Neurosci., 19: 1122–1141.
Garland, T., Jr., and A. R. Ives (2000) Using the past to predict the present: Confidence intervals for regression equations in phylogenetic comparative methods. Am. Nat., 155: 346–364.
Garland, T., Jr., A. W. Dickerman, C. M. Janis, and J. A. Jones (1993) Phylogenetic analysis of covariance by computer simulation. Syst. Biol., 42: 265–292.
Garland, T., Jr., P. E. Midford, and A. R. Ives (1999) An introduction to phylogenetically based statistical methods, with a new method for confidence intervals on ancestral states. Am. Zool., 39: 374–388.
Gilbert, C., and N.J. Strausfeld (1991) The functional organization of male-specific visual neurons in flies. J. Comp. Physiol. A, 169: 395–411.
Gronenberg, W., and N.J. Strausfeld (1990) Descending neurons supplying the neck and flight motor of Diptera: physiological and anatomical characteristics. J. Comp. Neurol., 302: 973–991.
Hatsopoulos, N., F. Gabbiani, and G. Laurent (1995) Elementary computation of object approach by a wide-field visual neuron. Science, 270: 1000–1003.
Hausen, K., and M. Egelhaaf (1989) Neural mechanisms of visual course control in insects. In Facets of Vision (ed. by D.G. Stavenga and R.C. Hardie), Springer-Verlag, Berlin, pp. 391–424.
Holmqvist, M.H. (1994) A visually elicited escape response in the fly that does not use the giant fiber pathway. Vis. Neurosci., 11: 1149–1161.
Holmqvist, M.H., and M.V. Srinivasan (1991) A visually evoked escape response of the housefly. J. Comp. Physiol. A, 169: 451–459.
Jabłoński, P.G. (1994) Adaptive significance of colour patterns in Painted Redstart. J. Ornithol., 135: Suppl. 147.
Jabłoński, P.G. (1996) Dark habitats and bright birds: warblers may use wing patches to flush prey. Oikos, 75: 350–352.
Jabłoński, P.G. (1999) A rare predator exploits prey escape behavior: the role of tail-fanning and plumage contrast in foraging of the painted redstart (Myioborus pictus). Behav. Ecol., 10: 7–14.
Jabłoński, P.G. (2001) Sensory exploitation of prey: manipulation of the initial direction of prey escapes by a conspicuous ‘rare enemy’. Proc. R. Soc. Lond. B, 268: 1017–1022.
Jabłoński, P.G., and N.J. Strausfeld (2000) Exploitation of an ancient escape circuit by an avian predator: prey sensitivity to model predator display in the field. Brain Behav. Evol., 56: 94–106.
Killmann, F., and F. W. Schürmann (1985) Both electrical and chemical transmission between the lobula giant movement detector and the descending contralateral movement detector neurons of locusts are supported by electron microscopy. J. Neurocytol., 14: 637–652.
Killmann, F., H. Gras, and F. W. Schürmann (1999) Types, numbers and distribution of synapses on the dendritic tree of an identified visual interneuron in the brain of the locust. Cell Tiss. Res., 296: 645–665.
King, D.G., and K.L. Valentino (1983) On neuronal homology: A comparison of similar axons in Musca, Sarcophaga and Drosophila (Diptera: Schizophora). J. Comp. Neurol., 219: 1–9.
Milde, J.J., and N.J. Strausfeld (1990) Cluster organization and response characteristics of the giant fiber pathway of the blowfly Calliphora erythrocephala. J. Comp. Neurol., 294: 59–75.
Nolan, P.M., A.M. Stoehr, G.E. Hill, and K.J. McGraw (2001) The number of provisioning visits by house finches predicts the mass of food delivered. Condor, 103: 851–855.
O’Carroll, D.C., S.B. Laughlin, N.J. Bidwell, and R. A. Harris (1997) Spatio-temporal properties of motion detectors matched to low image velocities in hovering insects. Vision Res., 37: 3427–2439.
Pascual J.A., and J. Peris-Salvador (1992) Nestling body mass and nestling mortality associated with the application of the ligature method in the spotless starling (Sturnus unicolor). J. Ornithol., 133: 381–387.
Pearson, K.G., and M. O’Shea (1985) Escape behavior of the locust. The jump and its initiation by visual stimuli. In Neural Mechanisms of Startle Behavior (ed. by R. Eaton), Plenum Press, New York, pp. 163–178.
Remsen, J.V., and S.K. Robinson (1990) A classification scheme for foraging behavior of birds in terrestrial habitats. Stud. Avian Biol., 13: 144–160.
Rice, W.R. (1989) Analyzing tables of statistical tests. Evolution, 43: 223–225.
Rind F.C. 1984 A chemical synapse between two motion detecting neurons in the locust brain. J. Exp. Biol., 110: 143–167.
Rind, C.F., and D.I. Bramwell (1996) Neural network based on the input organization of an identified neuron signaling impending collision. J. Neurophysiol., 75: 967–985.
Rind, F.C., and P.J. Simmons (1992) Orthopterous DCMD Neuron: a reevaluation of responses to moving objects. I. Selective responses to approaching objects. J. Neurophysiol., 68: 1655–1666.
Rind, F.C., and P.J. Simmons (1997) Signaling of object approach by the DCMD neuron of the locust. J. Neurophysiol., 77: 1029–1033.
Rind, F.C., and P.J. Simmons (1999) Seeing what is coming: building collision-sensitive neurones. Trends Neurosci., 22: 215–220.
Rowell, C. H. F., and M. O’Shea (1976) The neuronal basis of a sensory analyser, the acridid movement detector system. I. Effects of simple incremental and decremental stimuli in light and dark adapted animals. J. Exp. Biol., 65: 173–188.
Rushton, W.A.M. (1951) A theory of the effects of fibre size in medullated nerve. J. Physiol. (London), 115: 101–122.
Ryan M.J., and A. Keddy-Hector (1992) Directional patterns of female mate choice and the role of sensory biases. Am. Nat., 139 (Suppl.): S4–S35.
Ryan, M.J. (1990) Sexual selection, sensory systems, and sensory exploitation. Oxford Surv. Evol. Biol., 7: 157–195.
Ryan, M.J. (1998) Sexual selection, receiver biases, and the evolution of sex differences. Science, 281: 1999–2003.
Ryan, M.J., J.H. Fox, W.W. Wilczynski, and A.S. Rand (1990) Sexual selection for sensory exploitation in the frog Physalemus pustulosus. Nature, 343: 66–67.
Shaw, R.S. (1989) The retina-lamina pathway in insects, particularly Diptera, viewed from an evolutionary perspective. In Facets of Vision (ed. by P.G. Stavenga and R.C. Hardie), Springer-Verlag, Berlin, pp. 186–212.
Sibley, C.G., and J.E. Ahlquist (1986) Phylogeny and Classification of new world suboscine passerine birds (Passeriformes: Oligomyodi: Tyrannides). Ornithol. Monogr., 36: 396–405.
Sibley, C.G., and J.E. Ahlquist (1990) Phylogeny and Classification of Birds. A Study in Molecular Evolution. Yale University Press, New Haven, CT.
Simmons, P.J., and F.C. Rind (1992) Orthopterous DMCD Neuron: a reevaluation of responses to moving objects. II. Critical cues for detecting approaching objects. J. Neurophysiol., 68: 1667–1692.
Strausfeld, N.J., and J.P. Bacon (1983) Multimodal convergence in the central nervous system of dipterous insects. In Multimodal Convergence in Sensory Systems of Insects (ed. by E. Horn), Gustav Fischer, Stuttgart, pp. 47–76.
Strausfeld, N.J., and U.K. Bassemir (1983) Cobalt-coupled neurons of a giant fibre system in Diptera. J. Neurocytol., 12: 971–991.
Strausfeld, N.J., and H.S. Seyan (1985) Convergence of visual, haltere and prosternal inputs at neck motor neurons of Calliphora. Cell Tiss. Res., 240: 1–16.
Tanouye, M.A., and D.G. King (1983) Giant fibre activation of direct flight muscles in Drosophila. J. Exp. Biol., 105: 241–251.
Trimarchi, J.R., and A.M. Schneiderman (1993) Giant fiber activation of an intrinsic muscle in the mesothoracic leg of Drosophila melanogaster. J. Exp. Biol., 177: 149–167.
Trimarchi, J.R., and A.M. Schneiderman (1995a) Different neural pathways coordinate Drosophila flight initiations evoked by visual and olfactory stimuli. J. Exp. Biol., 198: 1099–1104.
Trimarchi, J.R., and A.M. Schneiderman (1995b) Flight initiations in Drosophila melanogaster are mediated by several distinct motor patterns. J. Comp. Physiol. A, 176: 355–364.
Wicklein, M., and N.J. Strausfeld (2000) Organization and significance of neurons that detect change of visual depth in the hawk moth Manduca sexta. J. Comp. Neurol., 424: 356–376.
Wyman, R.J., J.B. Thomas, L. Salkoff, and D.G. King (1985) The Drosophila giant fiber system. In Natural Mechanisms of Startle Behavior (ed. by R. Eaton), Plenum Press, New York, pp. 133–161.
Zar, J.H. (1999) Biostatistical Analysis. Prentice-Hall Int., Inc., Englewood Cliffs, NJ.
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