Some info on the Blue Duiker as you asked for:
Mass: 4.5 kg, 7 kg
Gestation period: ± 130 days
Young: One, very rarely two
Weaning: 5 months
Sexual maturity: Females at 9-12 months, males at 12-18 months.
Shoulder height: 35 cm, 40 cm
Horns: 5 cm. The horns are sometimes absent in females
Life expectancy: 10 years
Family group: Solitary or in mating pairs.
Main predators: Leopard, small cats, Civet, Eagle, Crocodile, Python, Monitor Lizard.
Record price paid at an auction in South African Rand: R 3 700.00 March 2004
Recommended calibre: Light .22, shotgun or big bore rifle
Recommended bullet: Soft nosed or solid in big bore
Distribution: The Eastern Cape Province and KwaZulu Natal in South Africa, and Swaziland into Mozambique and eastern Zimbabwe also the whole of central Africa.
Description/Characteristics: This is the smallest of all southern African antelope. Females are generally larger than males in this duiker species. Its greyish-brown coat has a blue sheen on the back, hence the name. The throat, belly and chest are much paler, almost white, and both male and female have small horns.
Diet: This little antelope is a browser, feeding on leaves, small branches and wild fruit dropped by monkeys. It is a frequent drinker.
Habits: This is a nocturnal antelope, inhabiting very thick bush and forested areas. It lies up in dense vegetation during the day, grazing in the open areas, but always close to thickets into which it can disappear.
The Blue Duiker marks its territory with secretions from the facial glands, and is an incredibly timid animal. Solitary, it is very alert, and will always hesitate before entering clearings to ensure that there is no danger before proceeding. It is preyed upon by Crowned Eagles and Pythons, and is, unfortunately, heavily poached.
Status: Classified as vulnerable