he threatens to bite them
he gives them territories with lots of females
he gives them more food
he gives them more testosterone or progesterone
starting a fight
running away from a fight
sharing toys at the playground
reading a book
a type of tree lizard
a chemical that is higher in women than in men
a hormone in lizards and people
a type of lizard behavior
catching insects
warming themselves in the sun
communicating with other lizards
changing their hormone levels
All of the above
They are more aggressive
They have different colored dewlaps
They have territories
They have more testosterone and progesterone when they are babies