Ligature Strangulation. Strangulation is that form of asphyxia which is caused from constriction of the neck by ligature without suspending the body. Pulling a U-shaped ligature against the front and sides of the neck while standing at the back can cause death. It is of two types: [1] Strangulation by a ligature, and [2] manual strangulation or throttling.
What are the enemies of the monarch butterfly? The biggest threat to the monarch butterfly are wasps, bees, frogs, and especially people. Insects like to eat the eggs of monarch butterflies.
Although the Monarch larva can feed on a range of Milkweed species, it is largely dependent on Common Milkweed (Asclepias syriaca). From the point of view of the Monarch Butterfly, it is primarily the Ontario populations of Common Milkweed that are important to its breeding in Canada.