Many Anacondas will not eat again for several weeks or even months, depending on the size of the last meal. Normally the Anaconda is a solitary creature that stays within its own hunting area. This changes with the onset of the rainy season. Courtship can last for several months with this species. During this time, the female in breeding condition gives off pheromones, a chemical scent, which is tracked by nearby males.
Some scientists believe the females lay down a pheromone trial which the males follow.
Others believe that her scent is an air-borne chemical emission. This latter theory is supported by the fact that the female is not very active during this time and males come to her from all directions. Males have also been observed flicking the air to pick up the chemical presence. Courtship and copulation usually take place in the water. The male presses his body to the female and rests his head on her neck.