Emperor Penguins specie facts

Both the reading passage and the lecture discuss emperor penguins. While the passage says some old information about them, the lecturer provides a number of recent facts in order to cast doubt on the information. First, the reading claims that this specie is considered monogamous; each one of the couples would be loyal to the other one. However, the lecture insists that it is not true all of the time. It is better to say that they are serially monogamous, which means they would be faithful to their mates in the mating season. Next, the passage asserts that each colony of the penguins return to its specific area, which is entitled rookery. In contrast, based on a scientific investigation, the lecturer argues that a number of colonies would widely change the place for breeding. According to the data gathered from satellites, some colonies have altered their positions. Finally, the passage has stated that this kind of penguins is not endangered, and the number of them is almost stable. On the contrary the lecture points out that they need support. If humans do not care about them carefully, the population of them would decrease by one third by the end of the century.