In the United States, there are over 230 amphibians, over 280 reptiles and approximately 800 species of fish. Each of these categories has species represented on the US Endangered Species List.
Employees in the civil services work under one of the independent agencies or one of the 15 executive departments. In addition to departments, there are a number of staff organizations grouped into the Executive Office of the President.
The difference between hourly and salaried (exempt) employees is that hourly employees are paid overtime (1.5 times their hourly wage) for any time worked over 40 hours per week. However, you'll find that many full-time employees are paid a little more than their part-time counterparts.