1. Bowerbirds!

2. The bower…

3. Bowerbird reproductive success

4. Sperm and egg

5. Drosophila bifurca: one sperm!

6. Mormon cricket male with spermatophore

7. Elephant seals

8. Male-male competition and sexual dimorphism

9. Male dung beetle, Phanaeus vindex (Rattlebox photography)

10. Dung beetle burrows

11. Dung beetles: two morphs

12. Bluehead wrasse

13. Marine iguanas

14. Midshipmen

15. Sponge isopods (=sponge lice)

16. Damselfly scooper penis!

17. Mating crabs

18. Mate guarding: Seychelles warblers

19. Mate guarding: Seychelles warblers (cont.)

20. Red-backed spiders

21. Hangfly courtship gifts

22. Song repertoire: honest signal of chick weight in Sedge warblers

23. Blue tit

24. Canary song and physiological condition

25. Fiddler crab “chimney”

26. Satin Bowerbirds: multiple signals of health and fitness (and good genes?)

28. Petrie’s peacock data

29. Change in female resistance to male seminal peptides.

30. Is choosing the larger male maladaptive for female D. melanogaster?

31. Bedbugs: traumatic insemination

32. Bedbugs: mitigating effects of spermalege to traumatic insemination