Amphibians are vertebrates (that
is animals with a backbone) just like reptiles, mammals, fish, and birds.
Amphibians have moist, glandular skin and their bodies lack scales, hair,
feathers or claws. The word Amphibian comes from the Greek word
'amphibios' which means two lives, a larval stage and an adult stage, a
good example is the change or metamorphosis from the larval gill-breathing
tadpole to the adult lung-breathing frog. Amphibians are "cold-blooded"
which means that their body temperature is the same as the surrounding air,
water or soil. During freezing temperatures the frog's body produces a chemical
that acts like antifreeze, and keeps the cells alive.
Common Frog Rana temporaria Length 6-9cm
Common and widespread in Britain. Colour usually greenish brown or olive-buff
with darker blotches. Spawning takes place between December or April depending
what part of the country. Mating pairs and masses of frogspawn are a common
sight in most ponds. Males utter faint croaking song.
Smooth Newt Triturus vulgaris Length 8-10cm In
breeding season, the male shows spotted flanks, undulating crest along back,
and orange belly and pale throat with conspicuous spots. Brown female lacks
crest and is distinguished by spotted throat. Found in ponds, ditches and
lakes from March to September; thereafter, leaves water and hibernates during
winter months under fallen logs.
Reptiles Reptiles have been on earth for
about 200 million years. Physically reptiles are characterised by several
features: they are vertebrates, breath air with lungs, and have skin covered
with scales or plates. All reptiles are cold-blooded, meaning they depend on
their environment for body heat. LIZARDS, Most
lizards are 4-legged, live in diverse environments and are the most
geographically widespread of the reptiles. SNAKES, As a group, they lack legs, hearing, and movable
eyelids and have a large number of vertebrae, most of which have ribs attached.
TORTOISES, are another ancient group of reptiles,
their shell forms part of the skeleton. The shoulder girdle is located inside
the rib cage, which is part of the shell along with the backbone. Also, since
the chest cannot expand, breathing is accomplished by contracting different
sets of muscles.
Slow-Worm Anguis
fragilis Grows up to 50cm long,
usually brown or grey and very smooth and shiny. Female may have a dark line
along the back, male may have a few blue spots. Easily distinguished from a
snake by its more oval eye and movable eyelids.Feeds on insects, slugs and
worms and likes to basks in the sunshine, early or late in the
year. Habitat, vegetated and fairly damp areas...Dormant in
winter
Grass
Snake Natrix natrix Length 70-150cm Has greenish body with dark
blotches along flanks. Best distinguishing features are yellow neck collar and
round pupil. Found near ponds and canals, also in grassland and on heaths.
Food including frogs, tadpoles and fish.
Eggs laid in mounds of decaying waterside vegetation or in compost heaps; young
hatch in summer months. Hibernates from October to March.
Common Lizard Podarcis
muralis
Head and
body up to 7.5cm, tail up to 15cm. Generally brown or grey in colour with
vertical black and white bars on the tail. Males usually have dark spots on the
back and both sexes are sometimes tinged with green. Feeds on flies and other
insects and spiders. Likes basking on the tops of walls and tiled
roofs. Habitat, rocks, walls and terraces. Dormant in winter
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