Chapter 2 Opener These sterile worker weaver ants labor together to make leaf nests for the reproductive benefit of other ants. Why?

Figure 2.1 A group of worker termites escorted by a single large soldier back to their colony

Figure 2.2 A huge number of tiny sterile termites built this immense home for their colony in Western Australia

Figure 2.3 Sacrifices by social insect workers

Figure 2.3 Sacrifices by social insect workers (Part 1)

Figure 2.3 Sacrifices by social insect workers (Part 2)

Figure 2.4 The territories of an Australian songbird

Figure 2.4 The territories of an Australian songbird (Part 1)

Figure 2.4 The territories of an Australian songbird (Part 2)

Figure 2.5 Gary Larson’s cartoon of presumably suicidal lemmings headed into the ocean

Figure 2.6 How to achieve indirect fitness

Figure 2.7 A foundress female wasp

Figure 2.8 A colony of Dictyostelium discoideum

Figure 2.9 Haplodiploidy and the evolution of eusociality in the Hymenoptera

Figure 2.9 Haplodiploidy and the evolution of eusociality in the Hymenoptera (Part 1)

Figure 2.9 Haplodiploidy and the evolution of eusociality in the Hymenoptera (Part 2)

Figure 2.9 Haplodiploidy and the evolution of eusociality in the Hymenoptera (Part 3)

Figure 2.9 Haplodiploidy and the evolution of eusociality in the Hymenoptera (Part 4)

Figure 2.10 Monogamy and the origin of eusociality by kin selection in the Hymenoptera

Box 2.3 How are phylogenetic trees constructed and what do they mean?

Box 2.3 How are phylogenetic trees constructed and what do they mean? (Part 1)

Box 2.3 How are phylogenetic trees constructed and what do they mean? (Part 2)

Figure 2.11 Round dance of honey bees

Figure 2.12 Waggle dance of honey bees

Figure 2.12 Waggle dance of honey bees (Part 1)

Figure 2.12 Waggle dance of honey bees (Part 2)

Figure 2.13 Testing directional and distance communication by honey bees

Figure 2.13 Testing directional and distance communication by honey bees (Part 1)

Figure 2.13 Testing directional and distance communication by honey bees (Part 2)

Figure 2.14 The nest of an Asian honey bee, Apis florea, is built out in the open around a branch

Figure 2.15 Communication by scent marking in a stingless bee

Figure 2.16 Evolutionary history of the honey bee dance communication system

Figure 2.16 Evolutionary history of the honey bee dance communication system (Part 1)

Figure 2.16 Evolutionary history of the honey bee dance communication system (Part 2)

Figure 2.17 Workers and the queen monitor the reproductive behavior of others

Figure 2.18 Conflict within ant colonies in which workers that are about to reproduce are detected by colony mates and physically restrained

Figure 2.18 Conflict within ant colonies in which workers that are about to reproduce are detected by colony mates and physically restrained (Part 1)

Figure 2.18 Conflict within ant colonies in which workers that are about to reproduce are detected by colony mates and physically restrained (Part 2)

Figure 2.19 A test of the effectiveness of policing

Figure 2.20 The proportion of males produced by workers varies among ants, social bees, and social wasps

Figure 2.21 Colony kin structure is linked to queen production in eusocial Melipona bees

Figure 2.21 Colony kin structure is linked to queen production in eusocial Melipona bees (Part 1)

Figure 2.21 Colony kin structure is linked to queen production in eusocial Melipona bees (Part 2)