Variation of life history traits and mating patterns in female langur monkeys (Semnopithecus entellus) Carola BorriesAndreas KoenigPaul Winkler Original Article Pages: 391 - 402
Initiation and resolution of jumping spider contests: roles for size, proximity, and early detection of rivals Phillip W. TaylorOren HassonDavid L. Clark Original Article Pages: 403 - 413
Predator-specific alarm calls in Campbell's monkeys, Cercopithecus campbelli Klaus Zuberbühler Original Article Pages: 414 - 422
Extrapair copulations in western bluebirds (Sialia mexicana): female receptivity favors older males Janis L. Dickinson Original Article Pages: 423 - 429
Dynamics of calling by tree swallow (Tachycineta bicolor) nestmates Marty L. LeonardAndrew G. Horn Original Article Pages: 430 - 435
Selection for male choice based primarily on mate compatibility in the oldfield mouse, Peromyscus polionotus rhoadsi Karen Koeninger RyanJeanne Altmann Original Article Pages: 436 - 440
Changes in food source profitability affect the trophallactic and dance behavior of forager honeybees (Apis mellifera L.) Rodrigo De MarcoWalter Farina Original Article Pages: 441 - 449
Is the bat os penis sexually selected? D. Hosken K. Jones A. Dixson Original Article Pages: 450 - 460
Variation in maternal provisioning by lactating Antarctic fur seals (Arctocephalus gazella): response to experimental manipulation in pup demand J. Arnould I. Boyd M. Hindell Original Article Pages: 461 - 466
Heirs and spares: caste conflict and excess queen production in Melipona bees Francis L. Ratnieks Original Article Pages: 467 - 473
The phalloid organ, orgasm and sperm competition in a polygynandrous bird: the red-billed buffalo weaver (Bubalornis niger) M. Winterbottom T. Burke T. Birkhead Original Article Pages: 474 - 482