Well-baby exam: What to expect during routine checkups. A well-baby exam involves measurements, vaccines and an evaluation of your baby's development. Know the basics of a well-baby exam and how to prepare. Well-baby exams, or regular checkups, are an important way to monitor your baby's growth and development.
Generally speaking, an adult flea only lives for 2 or 3 months. Without a host to provide a blood meal, a flea's life can be as short as a few days. Under ideal conditions of temperature, food supply, and humidity, adult fleas can live for up to a year and a half.
For other uses, see Flea (disambiguation). Fleas are small flightless insects that form the order Siphonaptera. As external parasites of mammals and birds, they live by consuming the blood of their hosts. Adults are up to about 3 mm (0.12 in) long and usually brown. Bodies flattened sideways enable them to move through their host's fur or feathers; strong claws prevent them from being dislodged.