A SPECIES IN DANGER, A FOREST IN DANGER

  The squirrel or common Eurasian Red Squirrel (Sciurus vulgaris, Linnaeus 1758) One of the major threats to biodiversity is the spread of alien species (species transported outside of its distribution capabilities for the direct or indirect action of man): animals and plants introduced into new environments where they often…

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SEA DRAGONS

Draghi marini

  In the seas of the Triassic lived five major groups of marine reptiles: Pachypleurosauria, Placodontia, Nothosauria, Plesiosauria and Ichthyosauria. Each group is adapted to aquatic life in a very different way and altogether represent an important adaptive radiation to aquatic predators whose origins are probably independent.     Pachypleurosaurs…

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MANGIATOIA IN MOVIMENTO

Studio sul sistema d’orientamento degli uccelli nel ritrovare una mangiatoia Riassunto Il presente lavoro illustra i risultati ottenuti da osservazioni effettuate in un giardino a Ponteranica (Bergamo), sulla capacità d’alcuni uccelli di ritrovare o meno una mangiatoia che viene continuamente spostata. Area di studio, metodi e risultati L’area di studio…

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A “REAL” DANCER

White Wagtail (Motacilla alba alba, Linnaeus 1758) The White Wagtail is present almost everywhere in Europe. It is a small bird, with slender and elegant shape, long on average 18 cm and weights 23 grams. It has thin paws and a long and slender tail; the livery is grey but with…

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GLI INSETTI

Fotografia: Sirfidi (Syrphidae, Latreille 1802) Gli Insetti appartengono al grande phylum animale degli Artropodi, tale nome fa riferimento al fatto che essi possiedono arti segmentati. Gli Artropodi comprendono anche gli Aracnidi, i Crostacei e i Miriapodi. Gli Insetti sono il gruppo di animali di gran lunga più numeroso, attualmente se ne conoscono oltre…

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LIFE IN A DROP OF WATER

Acroperus harpae (Baird, 1834), Phylum Arthropoda, Subphylum Crustacea, Order Cladocerans Plankton (from greek πλαγκτόν, that vagabond) is the category that includes the ecological complex of aquatic floating organisms, not being able to actively directing their movement (at least in the horizontal direction), are passively transported by currents and wave action.…

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ARDEIDAE

Grey Heron (Ardea cinerea, Linnaeus 1758) Ardeidae is a family of birds Ciconiiformes including 19 genera and about sixty species, widespread in all tropical and temperate regions of the world. Ardeidae includes birds commonly known as Herons, Egrets, Night Herons, Bitterns, Little Bittern, etc. Small, medium or large, the Ardeidae possess…

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DO NOT CALL THEM DINOSAURS

Non chiamateli dinosauri

 Pterosaurs and dinosaurs belong to the group of Ornithodira, but are classified under two different superorders, the Pterosauromorpha and the Dinosauromorpha. The genetic distance between them is therefore the same as between a bear and a flying lemur. Define pterosaurs “Flying Dinosaurs” is therefore incorrect. The word “pterosaur” means…

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