Editorial: new chief editors Theo C. M. BakkerJames F. A. Traniello Editorial 17 August 2011 Pages: 1669 - 1670
From dummies to animations: a review of computer-animated stimuli used in animal behavior studies Kevin L. WooGuillaume Rieucau Review 12 July 2011 Pages: 1671 - 1685
Age before beauty? Relationships between fertilization success and age-dependent ornaments in barn swallows Jan T. LifjeldOddmund KlevenRaleigh J. Robertson Original Paper Open access 22 March 2011 Pages: 1687 - 1697
Sperm competition risk affects male mate choice copying David BierbachClaudia KronmarckMartin Plath Original Paper 07 April 2011 Pages: 1699 - 1707
Kill before being killed: an experimental approach supports the predator-removal hypothesis as a determinant of intraguild predation in top predators Rui LourençoVincenzo PenterianiJoão Eduardo Rabaça Original Paper 07 April 2011 Pages: 1709 - 1714
Cannibalism in the lifeboat — collective movement in Australian plague locusts Matthew J. HansenCamille BuhlGregory A. Sword Original Paper 07 April 2011 Pages: 1715 - 1720
Sexual selection based on egg colour: physiological models and egg discrimination experiments in a cavity-nesting bird Jesús M. AvilésJuan J. SolerNathan S. Hart Original Paper 21 April 2011 Pages: 1721 - 1730
Previous experience matters in the stalk-eyed fly Teleopsis dalmanni Alison R. EggeJohn G. Swallow Original Paper 12 April 2011 Pages: 1731 - 1737
Effects of multiple-speaker playbacks on aggressive calling behavior in the treefrog Dendropsophus ebraccatus Michael S. Reichert Original Paper 12 April 2011 Pages: 1739 - 1751
Costs of delayed dispersal and alloparental care in the fungus-cultivating ambrosia beetle Xyleborus affinis Eichhoff (Scolytinae: Curculionidae) Peter H. W. BiedermannKier D. KlepzigMichael Taborsky Original Paper 15 April 2011 Pages: 1753 - 1761
Effect of substrate roughness on load selection in the seed-harvester ant Messor barbarus L. (Hymenoptera, Formicidae) Abel BernadouXavier EspadalerVincent Fourcassié Original Paper 19 April 2011 Pages: 1763 - 1771
Longevity, calling effort, and metabolic rate in two populations of cricket Kensuke OkadaWilliam R. PitchersDavid J. Hosken Original Paper 15 April 2011 Pages: 1773 - 1778
Egg testosterone affects wattle color and trait covariation in the ring-necked pheasant Andrea Bonisoli-AlquatiDiego RuboliniNicola Saino Original Paper 26 April 2011 Pages: 1779 - 1790
Nepotistic access to food resources in cooperatively breeding carrion crows Elisa ChiaratiDaniela CanestrariVittorio Baglione Original Paper 27 April 2011 Pages: 1791 - 1800
Behavioural syndromes in juvenile brown trout (Salmo trutta); life history, family variation and performance in the wild Johan HöjesjöBart AdriaenssensJörgen I. Johnsson Original Paper 03 May 2011 Pages: 1801 - 1810
Sociality, Bateman’s gradients, and the polygynandrous genetic mating system of round-tailed ground squirrels (Xerospermophilus tereticaudus) Karen E. MunroeJohn L. Koprowski Original Paper 26 April 2011 Pages: 1811 - 1824
Chelipeds are the real weapon: cheliped size is a more effective determinant than body size in male–male competition for mates in a hermit crab Kenji YoshinoTsunenori KogaSayaka Oki Original Paper 19 April 2011 Pages: 1825 - 1832
Pursuit deterrence, predation risk, and escape in the lizard Callisaurus draconoides William E. Cooper Jr. Original Paper 03 May 2011 Pages: 1833 - 1841