Compared to many other snakes, vipers often appear rather sluggish. Most are [[Ovoviviparity|ovoviviparous]], giving birth to live young, but a few lay eggs; the word "viper" is derived from Latin ''vivo'' = "I live" and ''pario'' = "I give birth".<ref name="Sch02">Schuett GW, Höggren M, Douglas ME, Greene HW. 2002. Biology of the Vipers. Eagle Mountain Publishing, LC. 580 pp. 16 plates. ISBN 0-9720154-0-X.</ref> |
Compared to many other snakes, vipers often appear rather sluggish. Most are [[Ovoviviparity|ovoviviparous]], giving birth to live young, but a few lay eggs; the word "viper" is derived from Latin ''vivo'' = "I live" and ''pario'' = "I give birth".<ref name="Sch02">Schuett GW, Höggren M, Douglas ME, Greene HW. 2002. Biology of the Vipers. Eagle Mountain Publishing, LC. 580 pp. 16 plates. ISBN 0-9720154-0-X.</ref> |