in the National - Tapada Nacional de Mafra
Transcription
in the National - Tapada Nacional de Mafra
Mammals in the National Hunting Grounds of Mafra The Red Deer (Cervus elaphus) Larger than its related fallow deer, this species proves highly imposing. Male red deer display branches of pointed tipped antlers in a formation equal to that of the fallow deer. Indeed, this species does keep to a life cycle and behaviours similar to those described for fallow deer. The bellow of this species is more tuneful if only because male adults defend territories spanning large areas. They are shyer in habit and normally more active in the early dawn and where not actual- ly during the night. They inhabit the less frequently visited zones of the Hunting Grounds, with plenty of areas for taking refuge with exception of the breeding season (autumn) when the species becomes less concerned about any human presence. The National Hunting Grounds of Mafra are home to a wild population of around 50 with a further few living in enclosures. The species is herbivorous and thus feeding off fruits, grass and the sprouts of trees and bushes. Deer rarely make recourse to feeding troughs such is their level of unwillingness to interact with human beings. The fawns, one per female, are normally born earlier than the fallow deer (May/June) and also after around seven months of gestation. They first display a mottled tone but this begins disappearing at around the age of three to four months. The hides of both young and adults is always in homogenous brown tones irrespective of the season of the year. Red Fox Genet The Egyptian Mongoose The red fox is a Canidae that roams freely and abundantly throughout the National Hunting Grounds of Mafra even while its effective total population remains unknown. This a territorial animal that demarcates its borders by faeces (placed on tufts of grass or stones), urine and other secretions. Within this territory, the fox digs its network of burrow. Reproduction takes place in December and January and after around 50 days, the fox cubs are born in numbers of between 4 -5. They are primarily nocturnal or crepuscular in their activities whilst becoming more diurnal in summer when the food supply becomes scarcer. At such times, they frequently turn to fruit. Direct observations are scarce but their presence is clearly noticeable whether through their footprints, excrement or even their body odours. Night and dawn visits are best recommended for those wishing to observe this inhabitant. Resembling a small sized cat, this species has nocturnal habits and shuns attention and is correspondingly difficult to spot. The genet is a carnivorous species and feeding off rodents, birds and even reptiles and is a particularly capable climber. Due to its habit of always depositing its excrement in the same place — latrines—, the animal’s presence proves easy to identify. Breeding takes place in mid-February and March or July and August with the offspring born eleven weeks later and numbering between 1-4 in a nest built into a trunk or a hole between rocks. The species also contains odorous and fairly prominent glands by its tail and, in situations of threat, releases a very strong and disturbing stench. With its long body and short legs, this species has daily habits but its shy behaviour renders it difficult to spot or observe. The animal frequently raises itself up on its hind legs to better observe its surroundings. This carnivorous species feeds primarily off rabbits, rodents, birds, eggs and reptiles. They live in family groups formed by the female, her offspring and young (from the previous breeding season). The breeding season takes place in February/March and after around 84 days, between 4 and 6 mongoose are born. As with African antecedents, the mongoose is resistant to snake venom. This species also stands out for having horizontal eye pupils, a rare occurrence among mammals. In the National Hunting Grounds of Mafra, they may occasionally be spotted in the Tojeira zone as this is both an open area and with plenty of rabbits and reptiles. (Vulpes vulpes) (Genetta genetta) (Herpestes ichneumon) Fallow Deer (Cervus dama) The Fallow Deer, Cervus dama, is the most abundant member of the Cervidae family in the National Hunting Grounds of Mafra (in excess of 300 individuals) and also the most sociable towards humans. As with the majority of the Cervidae, only the males display antlers that in this species tend to flatten lengthwise. The antlers are bone structures that experience discontinuous periods of growth and are shed annually in spring before immediately beginning to grow again before peaking in size late in July. During autumn, the adult males do battle amongst themselves over possession of the females. During this period, they issue snorting sounds entitled a bellow. The bellow serves the purpose of attracting the attention of females and dissuading competing males. The fawn, normally one per female, are born in May/June after around a 7-month gestation period. They display two skins over the course of the year: in winter, in dark and homogenous tones while turning lighter and more mottled during the summer months. This is a herbivorous species that essentially feeds off grass, fruit, tree and bush shoots. During the summer season, supplementary food is provided through specifically installed structures – feeding troughs. Skunk The european polecat Badger A smaller member of the Mustelidae family (males: 202-314 mm; females: 173-181 mm). This species remains active both day and night and alternating periods of activity with periods of rest. Breeding takes place in mid-April/May and in July/ August and after around 34-37 days between 4 and 6 young are born. Parental care is exclusively the responsibility of the female. This is a carnivorous species that lives essentially off rodents as skunks are small enough to chase them down in their own burrows. They are solitary animals. The polecat also belongs to the Mustelidae family even whilst larger in size than the skunk (male: 30-46 cm; female: 29-35 cm). This species also displays nocturnal habits with the males solitary and the females caring for the young. They are carnivorous feeding off rodents, insects, birds and worms and displaying food storage practices. Breeding takes place between March and June before 2-12 polecats are born some 42 days later. Its domesticated version is known as the ferret and previously deployed by hunters to scare rabbits out of their burrows. The badger is the final representative of the Mustelidae family in the grounds. Nocturnal in habits, the badgers are also very reticent in behaviour and hence difficult to spot. However, any close attention to the floor very commonly finds their footprints easily identified given its characteristic five pad and five nail markings. It goes into semi-hibernation between November and February and lives in social groups. Breeding takes place between February and May, with 1-5 badgers born to each reproductive cycle (with an effective gestation period of 7 weeks). This is an omnivorous animal with its diet spanning worms, insects, rodents, moles, rabbits, fruits and bulbs. (Mustela nivalis) (Mustela putorius) (Meles meles) Wild Boar (Sus scrofa) A member of the Suidae family, this species displays essentially crepuscular and nocturnal habits and abounds and runs throughout the extent of the National Hunting Grounds of Mafra. The males are somewhat more corpulent than the females and also grow more salient teeth (jutting out over the lip – razors and grinders). Depending on their ages, wild boar grow various types of skin: born with dark longitudinal lines and hence designated “lined”. As from six months, they gradually lose these lines and turn brownish. As from one year of age, they get darker with tones of grey and black emerging. These omnivorous animals scrabble in the soil to seek out seeds, fruits, roots, tubers and small invertebrates. They are also opportunist hunters and may go af- ter rabbits, reptiles, rodents and even feeding off dead bodies (more commonly in the summer season when other foodstuffs fall into short supply). Piglets number between 1-10 and born as winter ends and spring begins after approximately four months of gestation. The births occur in special shelters that the progenitors themselves construct - “birthing shelters”. European Rabbit (Oryctolagus cuniculus) The Spanish Mole (Talpa occidentalis) The Spanish mole belongs to the Talpidae family. This particular species remains active both by day and by night even while spending the bulk of its life living within the network of tunnels dug out with its frontal spade shaped feed. The mole lives almost exclusively off worms but does also eat insects and slugs. Breeding takes place in the month of April with 3-4 offspring born around 28 days later. Its presence is easily detected by the small pile of earth left on the surface entrance to any of its tunnels. The European rabbit belongs to the Leporidae family, which also includes the hare. They live in colonies and their various members leave their excrement only in specific sites - latrines. Within each colony, there is a strong social hierarchy and in which the dominant hold the right to the best burrows. The latrines are found in abundance within the scope of fenced areas as is the case with the Boavista field (on the yellow footpath route). This is a herbivorous species feeding off grass, roots and leaves. They are busiest at night and during the early hours of dawn. Breeding takes place year round with the majority of offspring born between April and June. The period of gestation extends over 28-33 days with each litter containing 3-12 newly borns that are blind, death and skinless and with 3-7 litters born each year. Hedgehog (Erinaceus europaeus) The hedgehog belongs to the Erinaceidae family and correspondingly has its body covered with spines that get replaced on an irregular basis. They are nocturnal inhabits and fairly elusive. This omnivorous species lives off a diet of worms, insects, spiders, slugs, amphibians, young rodents, fruits and mushrooms. They are solitary and non-territorial animals. Breeding happens in spring, following the emergence from hibernation. After 3135 days of gestation, the young are born in groups of 4-6. Once again, the excrement easily gets found and identified given its distinctive small c shape and with the insect elytrons clearly visible. Microtus arvalis Common Vole Crocidura russula White-toothed shrew Rattus rattus Black Rat Micro-mammals The small mammals of the Hunting Grounds There are various species of micro-mammal living in the National Hunting Grounds of Mafra even while there is neither a complete current inventory nor data on their respective population sizes. However, observations do indicate that the Enchanted Forest is home to micro-mammals from the Soricidae and Muridae families. Soricidae: Sorex sp. – Shrew Crocidura russula – White-toothed shrew Muridae: Apodemus sylvaticus – Wood Mouse Rattus rattus – Black rat Mus sp. – House Rat Microtus sp. – Vole Microtus arvalis – Common Vole Apodemus sylvaticus Wood Mouse © The Darwin Initiative Centre for Bat Research European Free-tailed Bat Tadarida teniotis (410mm) Geoffroy’s Bat Myotis emarginatus (220-285mm) Greater Noctule Bat Lesser Horseshoe Bat Rhinolopus hipposideros (192-254mm) Nyctalus noctula (320-400mm) National Hunting Grounds of Mafra Bats, small and poorly understood mammals, form part of our collective imaginary and are inherently bound up with fear and stories about the night. They are nevertheless the only mammals able to fly at night and with an ability that triggers curiosity in even the most sceptical. In Portugal, there are 27 known species of bat and all of them insect eaters. However, there is much still to be discovered about these species. We do know that they represent one of the most endangered species in our fauna due to their sensitivity to disturbances in critical seasons, the negative consequences from the application of pesticides and to their own low birth rates bearing but one bat per year. Hence, bats not only represent a vulnerable species but also some of them are in critical condition and at risk of extinction. In the National Hunting Grounds of Mafra, there has been an increasing number of species identified as the large trees prove favourable to the hosting of colonies of vesper bat. Standing out within this large group is Bechstein’s bat — Myotis bechsteinii with a wing span of around 250-300mm, this species is listed by the IUCN, the International Union for the Conservation of Nature as “In Danger” that reflects the correspondingly high risk of its extinction. With few alternative habitats, the water mines provide shelter for some types of cave bats such as the colony of lesser horseshoe bats — Rhinolopus hipposideros displaying wing spans of between 192254mm and that inhabit one of the many water mines existing in the grounds. There are many species of bat about which we lack the information necessary to making affirmations as to the level of threat they face and thus also demonstrating that there is still much to learn and study about these magnificent mammals. However, the knowledge already gained about their characteristics has been applied to the technological development of sonar, communication, echographies and devices to measure speed as well as in the field of medicine with treatments for cardiovascular complications arising out of the anticoagulant saliva of the hematophagus bats of South America. One clearly proven facet is the importance of bats to balancing ecosystems as the fact that they consume significant quantities of insects every night helps in controlling and avoiding plagues causing damage to agricultural crops. © Emiliano Mori Bats: the Chiropteras of the Greater Noctule Bat Nyctalus leisleri (60mm) Serotine Bat Eptesicus serotinus (315-380mm) Pipistrelle Bat Pipistrelle Bat Lesser Mouse-eared Bat Greater Mouse-eared Bat Pipistrellus pipistrellus (210-240mm) Myotis blythii (350-400mm) Natterer’s Bat Myotis escaleri (245-300mm) Bechstein’s Bat Myotis bechsteini (250-300mm) Pipistrelus pygmaeus (210-240mm Myotis myotis (350/450mm) Brown Long-eared Bat Plecotus auritus (240-285mm) Mammals in the National Hunting Grounds of Mafra PATRIMÓNIO NATURAL COM HISTÓRIA.