Non-parental infanticide in a dense population of the Black-billed Magpie (Pica pica) Sang-im LeeKyungseon SeoPiotr Jabłoński Video Article Open access 21 June 2011 Pages: 401 - 407
Barn swallow (Hirundo rustica) parents use past information to decide on food provisioning to the brood, but not to decide on allocation within the brood Wataru KitamuraGo FujitaHiroyoshi Higuchi Article 20 July 2011 Pages: 409 - 417
Evidence of helping behavior in a free-ranging population of communally breeding warthogs Angela M. WhiteElissa Z. Cameron Article 05 February 2011 Pages: 419 - 425
Characterization of chemical defenses in ranid tadpoles against a fish predator Teruhiko TakaharaChinami Mitsuhashi-OhnishiRyohei Yamaoka Article 06 February 2011 Pages: 427 - 434
Sexually dimorphic male horns and their use in agonistic behaviors in the horn-headed cricket Loxoblemmus doenitzi (Orthoptera: Gryllidae) Hokyung KimYikweon JangJae C. Choe Article 11 May 2011 Pages: 435 - 441
Seasonal and sexual variation in vigilance behavior of goitered gazelle (Gazella subgutturosa) in western China Canjun XiaWenxuan XuWei Liu Article 10 May 2011 Pages: 443 - 451
Physical attractiveness influences reproductive success of modern men P. ProkopPeter Fedor Article 06 May 2011 Pages: 453 - 458
Tower construction by the manicure crab Cleistostoma dilatatum during dry periods on an intertidal mudflat Tae Won KimHeung Jin RyuJae Chun Choe Article 07 May 2011 Pages: 459 - 465
Interspecific territoriality in males of the tube blenny Neoclinus bryope (Actinopterygii: Chaenopsidae) Atsunobu MuraseTomoki Sunobe Article 11 May 2011 Pages: 467 - 472
Condition dependence of male nuptial gift construction in the spider Pisaura mirabilis (Pisauridae) Maria J. AlboSøren ToftTrine Bilde Article 10 May 2011 Pages: 473 - 479
Competition for mangrove leaf litter between two East African crabs, Neosarmatium meinerti (Sesarmidae) and Cardisoma carnifex (Gecarcinidae): a case of kleptoparasitism? Sara FratiniAngela SacchiMarco Vannini Article 18 May 2011 Pages: 481 - 485
Factors influencing mutual gaze in captive female Japanese monkeys (Macaca fuscata) Paul C. P. CurtinMark E. HauberPeter Moller Short Communication 22 February 2011 Pages: 487 - 491
Geographic variation in learning of escape behavior in the little brown skink (Scincella lateralis) Mark A. Paulissen Short Communication 06 May 2011 Pages: 493 - 497
Kin recognition in immatures of Heliconius erato phyllis (Lepidoptera; Nymphalidae) Janaína De NardinAldo Mellender de Araújo Short Communication 06 May 2011 Pages: 499 - 503
Oedipus complex in an Antarctic fur seal pup? Mia WegeMarthán N. BesterMartin Postma Short Communication 04 May 2011 Pages: 505 - 507