Letter from the Editors
Resource defense in a group-foraging context
Sex-specific differences in reindeer calf behavior and predation vulnerability
Gape coloration reliably reflects immunocompetence of barn swallow (Hirundo rustica) nestlings
Evolutionarily stable kleptoparasitism: consequences of different prey types
Extremely female-biased sex ratio and lethal male–male combat in a parasitoid wasp, Melittobia australica (Eulophidae)
Do bacterial infections cause reduced ejaculate quality? A meta-analysis of antibiotic treatment of male infertility
Experimental analysis of territory size in a population of the fire ant Solenopsis invicta
Live and let die: why fighter males of the ant Cardiocondyla kill each other but tolerate their winged rivals
Tests of the mate-guarding hypothesis for social monogamy: male snapping shrimp prefer to associate with high-value females
Male ornamentation, timing of breeding, and cost of polygyny in the collared flycatcher
Analysis of multiple aspects of a repeated signal: power and rate of rapping during shell fights in hermit crabs
Arms races between social parasites and their hosts: geographic patterns of manipulation and resistance
Prolonged mate guarding and sperm competition in the weevil Diaprepes abbreviatus (L.)
Do energetic demands constrain incubation scheduling in a biparental species?
Glow-worm larvae bioluminescence (Coleoptera: Lampyridae) operates as an aposematic signal upon toads (Bufo bufo)
The ideal free distribution when the resource is variable
The benefits of costly signaling: Meriam turtle hunters
Evolution of fighting behavior under asymmetric competition: an experimental test with juvenile salmonids
Female preference for male courtship flashes in Photinus ignitus fireflies
Consistent mixing of near and distant resources in foraging bouts by the solitary mason bee Osmia lignaria