Chapter 6 Opener: The leafy sea dragon

6.1 Mobbing behavior of colonial, ground-nesting gulls

6.2 Two black-headed gulls on their nests

6.3 Does mobbing protect eggs?

6.4 Benefit of high nest density for the arctic skua

6.5 Gull phylogeny and two scenarios for the origin of cliff-nesting behavior (Part 1)

6.5 Gull phylogeny and two scenarios for the origin of cliff-nesting behavior (Part 2)

6.6 Not all gulls nest on the ground

6.7 The logic of the comparative method

6.8 Colonial California ground squirrels have evolved mobbing behavior

6.9 Evidence for a cost of parental mobbing behavior

6.10 The dilution effect in butterfly groups (Part 1)

6.10 The dilution effect in butterfly groups (Part 2)

6.11 The dilution effect in mayflies

6.12 Fighting back by terns and wasps

6.13 Communal defense by sawfly larvae

6.14 A group of sleeping bees

6.15 Cryptic coloration depends on background selection

6.16 The camouflaged moth, Biston betularia

6.17 Predation risk and background selection by moths

6.18 Cryptic coloration and body orientation

6.19 Does cryptic behavior work?

6.20 The value of a backpack (Part 1)

6.20 The value of a backpack (Part 2)

6.21 Personal hygiene by a skipper butterfly larva may be an antipredator adaptation

6.22 Warning coloration and toxins

6.23 Effect of monarch butterfly toxins

6.24 Why behave conspicuously?

6.25 An advertisement of unprofitability to deter pursuit?

6.26 Cheetahs abandon hunts more often when gazelles stot

6.27 Are pushup displays an honest signal of a lizard’s physiological condition?

6.28 The lizard Cnemidophorus murinus often waves a forearm at humans that disturb it

6.29 Fear screams and age in four European songbirds

6.30 An optimality model

6.31 Optimal covey size for northern bobwhite quail (Part 1)

6.31 Optimal covey size for northern bobwhite quail (Part 2)

6.31 Optimal covey size for northern bobwhite quail (Part 3)

6.32 Selfish herds may evolve in prey species

6.33 A game theoretical model