Unlike the majority of snake species, anacondas give birth to live babies - sometimes 40 at a time! There is some debate about the maximum size of anacondas, and there have been unverified claims of enormous snakes alleged to be as long as 30–45 m (98.4–147.6 ft). A 1944 petroleum expedition in Colombia claimed to have measured an 11.43 meters (38 ft) specimen; perhaps a more credible report came from scientist Vincent Roth, who claimed to have shot and killed a 10.3 meters (34 ft) specimen. Based on documented evidence, Anacondas can grow to about 23 feet long.