What is a 4 letter antonym for timid?

What do wolves do for defense? What r some endangered species? What are fossil fuels and when will they be depleted? Natural hazards responsible for extinction of species? Is it a possibility that BB153 and BDE209 could be a factor in the Tasmanians devil facial tumour disease? How does diffraction affect sound waves? How many years can tiger live for? Why are leaf scales sea snakes endangered animals? What are people Doing to prevent the extinction of the blue racer? Keystone species Jaguar? Is a ferret okay without another ferret? What is my purpose in the tiger mosquito's environment? Are meerkats going extinct? What do paleontologists do when they find a fossil? How is the island fox endangered? How did buffalo end up in the US? What are 3 major island groups of the Caribbean Islands? How many pandas were there in 1970s? What is orbea paradoxa? Species that are found in only one area and are especially vulnerable to extinction are referred to as which type of species?