Neck and limb stretches in Giraffes require an unusual cardiovascular and respiratory system. The physiological adaptations of the circulatory system have been studied in detail by many. The hydrostatic pressure exerted by gravity on the column of blood in the neck, the heart is about 2m away from the head; necessitates an average systemic blood pressure of ~200 mm Hg compared with the standard of 100 mm Hg in other land mammals.
Western gorillas are endemic to western central Africa where they live; Gorilla g. gorilla is distributed over six or seven countries from south of Sanaga R. south through S. Cameroon, SW Central African Republic, mainland Equatorial Guinea (Rio Muni/Mbini), and Gabon, into extreme N. Angola (Cabinda enclave) to Congo R., and east into W. Congo and across the Sangha R. to about the Oubangui R. Western boundary is the Atlantic Ocean.
Due to its large size, the gorilla has only two major predators. Humans are by far the main predator of G. gorilla, killing animals for their meat, and body parts and in retaliation for damage to crops. Leopards are important predators at some sites, with G. gorilla accounting for 4–9% of biomass consumed. Gorilla gorilla, like G.beringei, is prone to many pests and diseases.
Giraffes breed all year round, although peak births have been observed in many populations including Nairobi N.P. in Kenya- August and September, Waza N.P. in Cameroon (November-January when acacia blooms, Serengeti N.P. (September ) and northern Namibia, December;
The majority of western lowland gorillas are in Gabon and Congo. Their number in Gabon was estimated at between 28,000 and 42,000 in the early 1980s. Congo had a similar number in 1989–1990. Cameroon held ca. 15,000 gorillas in 1998. Equatorial Guinea (Rio Muni/Mbini) supported >3000 G. g. gorilla in 2011. In 2009, the total number of western gorillas was estimated at >150,000.
If you like check out coloring pages of rhinos.
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The state has changed for better and for worse in recent years. The southern white rhinoceros was once widespread throughout southern Africa. They were almost wiped out by poachers in the 19th century, with less than 100 individuals surviving. In 1994, the IUCN classified the southern white rhinoceros as vulnerable, and because of a higher number of no, in 1996 it was changed to Low Risk.
When in the water, Common Hippos lift their slit-like nostrils up on the surface to breathe, at intervals of up to 6 min. A reflex response ensures that the nostrils and ears are closed as soon as they come into contact with water. By lifting the head above the water level, the ears, eyes, and nostrils are allowing for visual, acoustic, and olfactory perception.
Hippos do not have real sweat glands but do have a pink secretion.
