- the Old World,
viperids are
located everywhere except Siberia, Ireland, and
north of the
Arctic Circle in
Norway and Sweden. Wild
viperids are not found...
- Currently, 23
genera and 155
species are recognized:
These are also the only
viperids found in the Americas. The
groups of
snakes represented here
include rattlesnakes...
-
species within its range, it may be
encountered by humans.
Unlike other viperids, it
often "freezes"
instead of
slithering away and fleeing, due to its...
- up to 18 young, with an
average of
about 10 per litter. Like most
other viperids, the
young are born
enveloped in thin
embryonic membranes, from
which they...
-
delivered through fangs.: 243 The
fangs of 'advanced'
venomous snakes like
viperids and
elapids are hollow,
allowing venom to be
injected more effectively...
-
colubrid snakes. It is
distinguished from the
venom gland and is not
found in
viperids or elapids. It was
named for
French zoologist Georges Louis Duvernoy who...
-
Mojave rattlesnake (Crotalus scutulatus), a
viperid, is
primarily neurotoxic. Both
elapids and
viperids may
carry numerous other types of toxins. Postsynaptic...
-
which they want to mate
includes topping, a
behavior exhibited by most
viperids, in
which one male
twists around the
vertically elevated fore body of his...
- adders,
tiger snakes, mambas, king cobras,
cobras and more.
Viperidae (
viperids) True vipers,
including the Russell's viper, saw-scaled vipers, puff adders...
-
Until recently,
colubrids were
basically colubroids that were not elapids,
viperids, or Atractaspis. However,
recent research in
molecular phylogenetics has...
