
The cut-off point with regards to cow / bull and ram / ewe is the Nyala. A male Nyala is a bull and a female is a ewe. Anything larger is bull/cow and anything smaller is ram/ewe.
This crocodile was together with a lot of water turtles, observing the road for possible bites from bypassing cars.
Usually only one calf is born to a pregnant female. An orphaned calf will usually be adopted by one of the family's lactating females or suckled by various females. Elephants are very attentive mothers, and because most elephant behavior has to be learned, they keep their offspring with them for many years. Tusks erupt at 16 months but do not show externally until 30 months. The calf suckles with its mouth (the trunk is held over its head); when its tusks are 5 or 6 inches long, they begin to disturb the mother and she weans it. Once weaned usually at age 4 or 5, the calf still remains in the maternal group.