Bowerbirds!

The bower…

Bowerbird reproductive success

Sperm and egg

Drosophila bifurca: one sperm!

Mormon cricket male with spermatophore

Elephant seals

Male-male competition and sexual dimorphism

Male dung beetle, Phanaeus vindex (Rattlebox photography)

Dung beetle burrows

Dung beetles: two morphs

Bluehead wrasse

Marine iguanas

Midshipmen

Sponge isopods (=sponge lice)

Damselfly scooper penis!

Mating crabs

Mate guarding: Seychelles warblers

Mate guarding: Seychelles warblers (cont.)

Red-backed spiders

Hangfly courtship gifts

Song repertoire: honest signal of chick weight in Sedge warblers

Blue tit

Canary song and physiological condition

Fiddler crab “chimney”

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

Petrie’s peacock data

Change in female resistance to male

seminal peptides.

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

Bedbugs: traumatic insemination

Bedbugs: mitigating effects of spermalege to traumatic insemination