The European stick insect (''Bacillus rossius'') also called the European stick bug or the European walking stick and the Mediterranean stick insect is a species of stick insect, common in

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a subcontinent of Eurasia and it is located entirel ...

. The species is endemic to the northwestern

Mediterranean The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western Europe, Western and Southern Europe and Anatolia, on the south by North Africa ...

, especially

Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , i ...

, Southern

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan area ...

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical ...

and the

Balkans The Balkans ( ), also known as the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. The region takes its name from the Balkan Mountains that stretch throughout the who ...

Overview

Adults have a slim body, with short antennae and long, thin legs. Colors vary from brown to green, sometimes with a pinkish tinge on its head, legs and sides. This species can eat

bramble A bramble is any rough, tangled, prickly shrub, usually in the genus ''Rubus'', which grows blackberries, raspberries, or dewberries. "Bramble" is also used to describe other prickly shrubs, such as roses (''Rosa'' species). The fruits inclu ...

leaves,

ivy ''Hedera'', commonly called ivy (plural ivies), is a genus of 12–15 species of evergreen climbing or ground-creeping woody plants in the family Araliaceae, native to western, central and southern Europe, Macaronesia, northwestern Africa and ...

, and

privet A privet is a flowering plant in the genus ''Ligustrum''. The genus contains about 50 species of erect, deciduous or evergreen shrubs, sometimes forming small or medium-sized trees, native to Europe, north Africa, Asia, many introduced and nat ...

. ''B. rossius'' can be found from June to mid December and the eggs look like seeds. Females are larger than the male, with a bigger

abdomen The abdomen (colloquially called the belly, tummy, midriff, tucky or stomach) is the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. The abdomen is the front part of the abdominal segment of the to ...

. An adult can be 10 cm (4 inches) in length.

Life cycle

The

nymphs A nymph ( grc, νύμφη, nýmphē, el, script=Latn, nímfi, label=Modern Greek; , ) in ancient Greek folklore is a minor female nature deity. Different from Greek goddesses, nymphs are generally regarded as personifications of nature, are ...

hatch out from their seed-like eggs 8 weeks to 2 months after being laid by a female. like the adult, the nymphs sway as in a breeze to avoid predators. ''B. rossius'' lives up to a year. They are nocturnal and may stay still for hours and usually feed at night. They shed the

exoskeleton An exoskeleton (from Greek ''éxō'' "outer" and ''skeletós'' "skeleton") is an external skeleton that supports and protects an animal's body, in contrast to an internal skeleton (endoskeleton) in for example, a human. In usage, some of the ...

a few times in their life.

Predators

The

predators Predation is a biological interaction where one organism, the predator, kills and eats another organism, its prey. It is one of a family of common feeding behaviours that includes parasitism and micropredation (which usually do not kill th ...

include

bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweig ...

frog A frog is any member of a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura (ανοὐρά, literally ''without tail'' in Ancient Greek). The oldest fossil "proto-frog" ''Triadobatrachus'' is ...

s, lizards,

rodent Rodents (from Latin , 'to gnaw') are mammals of the order Rodentia (), which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are rodents. They are n ...

s and

spider Spiders ( order Araneae) are air-breathing arthropods that have eight legs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk. They are the largest order of arachnids and rank seventh in total species ...

Gallery

File:Aquarium of Cattolica - Bacillus rossius.webm, Many young stick insects on leaves (video) File:Bacillus rossius 1.jpeg, A brown form File:B. rossius.jpg, ''B. rossius'' on a

twig A twig is a thin, often short, branch of a tree or bush. The buds on the twig are an important diagnostic characteristic, as are the abscission scars where the leaves have fallen away. The color, texture, and patterning of the twig bark ar ...

File:Stick insect s.jpg, A green form File:Bacillus rossius - 2012-10-16.webm, Video of a European stick insect (''B. rossius'') File:Bacillus rossius (female-3).jpg, Eating a leaf of ''

Rubus ulmifolius ''Rubus ulmifolius'' is a species of wild blackberry known by the English common name elmleaf blackberry or thornless blackberry and the Spanish common name ''zarzamora''. It is native to Europe and North Africa, and has also become naturalized ...

'' ( mouthparts also visible) File:Bacillus Rossi.jpg, Adult and nymph File:Bacillus rossius (female-1).jpg, Female stick insect File:Bacillus rossius (female-2).jpg, Female (head's detail) File:Bacillus rossius.jpg, A stick bug

References

External links