Mammals Vertebrates Animal Kingdom. Wildlife. Fauna. Zoology.

Mammals are the most evolved animals of all that exist, with some 5,000 different species worldwide.
Its size ranges from 4 centimeters for the dwarf shrew to 30 meters for the blue whale.
This evolution and variety have allowed them to conquer all environments on earth, both the continents and the seas and air.

General Characters

The common characters are:

• They are animals of constant temperature and with double and complete lung respiration.
• They have jaws with teeth.
• Their bodies are covered with hair and in the skin there are sweat and sebaceous glands.
• Four joints, with hands, hooves, claws, fins or wings.
• Its fertilization is internal and all females have breasts that secrete milk to feed their young.

Some distinctive features of mammals

The lower jaw is made up of a single dental bone.
The epiglottis is a valve that closes the entrance to the trachea.
A muscular septum, the diaphragm, separates the abdominal cavity from the thorax.
Almost all mammals have seven cervical vertebrae, regardless of the length of the neck.
The ear of mammals has three ossicles:

• The hammer,
• the anvil and
• the stirrup.

Some mammals have hair changes, depending on the seasons of the year.

Horns and antlers

The horns are hollow, bony protrusions that emerge from the skull and never fall off.
Some horns are made up of modified and fused hairs.
Antlers appear as buds on the skull and grow as spongy tissue that calcifies or hardens into bone.
The antlers are shed annually and new ones come out.

Development of mammals

Mammals have viviparous reproduction (except monotremes).
Its fertilization is internal through the copulatory organ of the male.
The baby before being born develops gradually in the mother's body, within several envelopes, and receives food from her through the placenta, and is protected by a bag full of water: the amnion.
After being born the young are suckled, taking milk from the mother's mammary glands.
In this table you can see the differences between the gestation periods and the number of offspring of a series of mammalian species:

Gestation periods and offspring of some mammals
House mouse	9 days	5-7 pups
House cat	2 months	4-6 pups
Dog	2 months	2-4 pups
Porcupine	2 months	2-4 pups
Deer	2 months	1-3 calves
Male	9 months	1 calf
Whale	10-12 months	1 calf
Elephant	24 months	1 baby

Classification of Mammals in Aragon

Due to the persecution they have been subjected to, they are elusive and difficult to observe. We could do the following small classification:

ORDER	FAMILY	Genus and species	Common name
Chiropterans	.	20 species	Bats
Insectivores	Erinaceids	Erinaceus europaeus	Common hedgehog
	Tálpidos	Talpa europaea	Common mole
		Galemys pirenaicus	Pyrenean Desman
	Sorícidos	Crocidura russula	Common shrew
		Sorex araneus	Forest shrew
		Sorex alpinux	Alpine shrew
		Neomys fodiens	Water shrew
		Neomys anomalus	Cabrera's water shrew
		Suncus atruscus	Dwarf mosgaño or Shrew
Lagomorphs	Leporidae	Oryctolagus cuniculus	Common Rabbit
		Leptus europaeus	European Hare
		Leptus timidus	Variable hare
Rodents	Sciurids	Sciurus vulgaris	Red squirrel
		Marmot marmot	Marmot
	Glyrididae	Eliomys quercinus	Dormouse
		Glis glis	Gray dormouse
	Microtids	genus Pitymys: 3 species	Voles
		Clethrionomys glareolus	Red vole
		Microtus nivalis	Snowy Rat
		Microtus arvalis	Peasant mouse
		Microtus cabrerae	Mediterranean rat
		Microtus agrestis	Wild mouse
		Arvicola sapidus	Water rat
		Arvicola terrestris	Northern water rat
	Murids	Rattus rattus	Black rat
		Rattus norvegicus	Gray or common rat
		Apodemus flavicolis	Fawn mouse
		Apodemus sylvaticus	Field mouse
		Mus musculus	House mouse
		Mus spretus	Wild mouse
Carnivores	Canidae	Canis lupus	Wolf?
		Vulpes vulpes	Fox
	Ursidae	Ursus arctos	Brown bear
	Mustélids	Meles meles	Badger
		Lutra lutra	Otter
		Tuesday Tuesday	Marta
		Tuesday foina	Garduña
		Mustela nivalis	Weasel
		Mustela erminea	Ermine
		Putoris putoris	Polecat
	Vivérridos	Ginetta ginetta	Gineta
	Felidae	Lynx parnina	Iberian lynx ???
		Lynx lynx	European lynx ???
		Felis sylvestris	Wildcat
Artiodactyls	Suidos	Sus scrofa	Wild boar
	Deer	Dama dama	Fallow deer
		Cervus elaphus	Deer
		Capreola capreola	Roe deer
	Bovidae	Capra pyrenaica	Mountain goat
		Rupricapra rupricapra	Sarrio



Other information about fauna in Aragón:

A small list of species in Aragon would be the following:

Vertebrates	Invertebrates
Mammals Red squirrel. Bear. Fox. Artiodactyl Ungulates Deer. Wild pig. Birds Classification of Birds Storks. Capercaillies. Reptiles Amphibians Urodelos.    Marbled Triton.    Webbed Triton.    Pyrenean triton. Anurans. Fishes	Metazoans Arthropods Myriapods Insects Arachnids Spiders Crustaceans Annelids Worm Molluscs Asquelmintos Platelmintos Celentereos Porifera Protozoa
images about the fauna in Aragon.    photographs on invertebrates.    beneficial animals for agriculture.



Auch Aragon genießt eine vielfältige und abwechslungsreiche Natur, in der Pflanzen vorbeigehen, Tiere, Geologie oder Landschaften erreichen wir ein fantastisches Bestiarium, das in seinen Denkmälern lebt.

Die Informationen werden ohne einen Spaziergang durch die drei Provinzen nicht vollständig sein, mit Abschaltungen in einigen seiner spektakulären Landschaften wie Ordesa, der Moncayo, Monegros oder durch Widerspruch den Ebro.

Sie können sich auch den immateriellen widmen: von der Legendenzusammenstellung das gilt auch für das universelle Aragon.