The other situation is if mom has O type blood. The same thing can happen as with the (-) and (+) blood type difference, but it is not as severe. If mom has O+ or O- blood type, and the baby has A+, A-, B+, B-, AB-, or AB- blood type, an ABO incompatibility can develop.
Why do howler monkeys howl? Howler monkeys live in family groups in the rain forests of South America. They howl so that other monkey groups do not stray into their territories. The sound also helps group members stay in contact with each other. Monkeys are communal animals that live in exclusive groups.
Monkeys are found naturally in the jungles and forests of the Southern Hemisphere. There are two ways to classify a monkey, the old world monkey (Asia and Africa) and the new world monkey (South America). There are around 260 known species of monkey worldwide ranging from chimpanzees to the tiny pygmy marmoset.owler monkeys are the loudest species of monkey with the howler monkeys howl being heard as far as 10 miles away. Monkeys use different noises, facial expressions and body movements to communicate with one another, with the monkey grinning being a sign of aggression.