Rapid sperm evolution in the bluethroat (Luscinia svecica) subspecies complex Silje HognerTerje LaskemoenArild Johnsen Original Paper 11 May 2013 Pages: 1205 - 1217
Are Lévy flight patterns derived from the Weber–Fechner law in distance estimation? Andy M. ReynoldsPatrick SchultheissKen Cheng Original Paper 30 May 2013 Pages: 1219 - 1226
Hierarchical dominance structure in reintroduced California condors: correlates, consequences, and dynamics James K. SheppardMatthew WalenskiRonald R. Swaisgood Original Paper 05 May 2013 Pages: 1227 - 1238
Does traumatic secretion transfer manipulate mating roles or reproductive output in a hermaphroditic sea slug? Rolanda LangeJohanna WerminghausenNils Anthes Original Paper 07 May 2013 Pages: 1239 - 1247
Sex differences in the consequences of maternal loss in a long-lived mammal, the red deer (Cervus elaphus) Daniel AndresTim H. Clutton-BrockKathreen E. Ruckstuhl Original Paper 11 May 2013 Pages: 1249 - 1258
Warning signals confer advantage to prey in competition with predators: bumblebees steal nests from insectivorous birds Piotr G. JablonskiHyun Jun ChoSang-im Lee Original Paper Open access 24 May 2013 Pages: 1259 - 1267
Learned recognition of novel predator odour by convict cichlid embryos Andrew B. NelsonShireen D. AlemadiBrian D. Wisenden Original Paper 05 May 2013 Pages: 1269 - 1273
Indiscriminate care of offspring predates the evolution of sociality in alloparenting social spiders Kieran SamukLeticia Avilés Original Paper 21 May 2013 Pages: 1275 - 1284
Vivid birds respond more to acoustic signals of predators Lexi JourneyJonathan P. DruryDaniel T. Blumstein Original Paper 21 May 2013 Pages: 1285 - 1293
Recognition of caste and mating status maintains monogyny in the ant Aphaenogaster senilis Camille RuelAbraham HefetzRaphaël Boulay Original Paper 25 May 2013 Pages: 1295 - 1305
Prostaglandin F2α facilitates female mating behavior based on male performance Michael R. KiddPeter D. DijkstraHans A. Hofmann Original Paper 23 May 2013 Pages: 1307 - 1315
Neophobia and social tolerance are related to breeding group size in a semi-colonial bird Sophie DardenneSimon DucatezVirginie M. Stevens Original Paper 31 May 2013 Pages: 1317 - 1327
Antipredator responses of koomal (Trichosurus vulpecula hypoleucus) against introduced and native predators Jennyffer CruzDuncan R. SutherlandLuke K.-P. Leung Original Paper 31 May 2013 Pages: 1329 - 1338
Increased behavioural lateralization in parasitized coral reef fish Dominique G. RocheSandra A. BinningMichael D. Jennions Original Paper 04 June 2013 Pages: 1339 - 1344
No reproductive character displacement in male advertisement signals of Hyla japonica in relation to the sympatric H. suweonensis Soyeon ParkGilsang JeongYikweon Jang Original Paper 06 June 2013 Pages: 1345 - 1355
Reproductive interference via interspecific pairing in an amphipod species complex Rickey D. CothranAndy R. StiffRick A. Relyea Original Paper 10 June 2013 Pages: 1357 - 1367
Selection for early emergence, longevity and large body size in wingless, sib-mating ant males Ilka M. KureckBeate NicolaiSusanne Foitzik Original Paper 18 June 2013 Pages: 1369 - 1377