Taken 22-Dec-08
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Photo Info
Dimensions3203 x 2126
Original file size3.82 MB
Image typeJPEG
Color spacesRGB
Date taken22-Dec-08 16:04
Date modified8-May-11 05:21
Shooting Conditions
Camera makeNIKON CORPORATION
Camera modelNIKON D3
Focal length300 mm
Focal length (35mm)450 mm
Max lens aperturef/5.3
Exposure1/2500 at f/5.3
FlashNot fired
Exposure bias+1 1/3 EV
Exposure modeAuto
Exposure prog.Shutter priority
ISO speedISO 1000
Metering modeCenter-weighted average
Digital zoom1.5x
The Grévy's zebra (Equus grevyi) - Imperial zebra. Lake Nakuru National Park, Kenya. East Africa 2009 © Nora de Angelli / www.noraphotos.com
The Grévy's zebra (Equus grevyi), also known as the Imperial zebra, is the largest extant wild equid and one of three species of zebra, the other two being the plains zebra and the mountain zebra. Named after Jules Grévy, it is the sole extant member of the subgenus Dolichohippus. The Grévy's zebra is found in Kenya and Ethiopia. Compared with other zebras, it is tall, has large ears, and its stripes are narrower. It is more ass-like in appearance as compared to other zebras, which are more horse-like.
The Grévy's zebra lives in semi-arid grasslands where it feeds on grasses, legumes, and browse; it can survive up to five days without water. It differs from the other zebra species in that it does not live in harems and has few long-lasting social bonds.
This zebra is considered to be endangered. Its population has declined from 15,000 to 3,000 since the 1970s. However, as of 2008 the population is stable.
Grévy's zebra differs from the other two zebras in its more primitive characteristics: its head is large, long, and narrow with elongated nostril openings. It is particularly mule-like in appearance with a brown muzzle. The ears are very large, rounded, and conical. Foals are born with brown and white striping, with the brown stripes darkening to black as they grow older.
Grevy's zebras can survive up to five days without water, but will drink daily when it is plentiful. They often migrate to better watered highlands during the dry season. Females require significantly more water when they are lactating. Behaviourally, the Grévy's zebra differs from the other two zebra species as it does not live in harems.
Grévy's zebras can mate and give birth year-round, but most mating takes place in the early rainy seasons and births mostly take place in August or September after the long rains.
Gestation of the Grévy's zebra normally lasts 390 days, with a single foal being born. A newborn zebra will follow anything that moves, so new mothers prevent other mares from approaching their foals while imprinting their own striping pattern, scent and vocalization on them.
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