The unusual feature of this river lies in its course, much of which is underground. It springs from the Snežnik (Snowy) mountain, below a peak...

The site on which the church stands today is where there probably used to be a temple dedicated to Spes Augusta, to whom four dedicatory stone...

The cave is located within a small doline with vertical sides 50 metres above the motorway near the cemetery of Duino and close to S.Giovanni al...

This forms extensive reed beds, particularly at river mouths. It resists moderate salinity by reducing its size. It is used for trellises, locally...

Frequent in the sea and in lagoons, and like dwarf eelgrass forms extensive fields which are very important for fish and waterfowl.

This North American species has spread widely in floodplains and along the coasts. It is an exotic, infesting species that greatly modifies the...

A halophyte (salt-tolerant) species not present in salt marshes but on rocky coasts and harbour works such as jetties and embankments, even in...

Frequent in lowland woods where it prefers the wettest locations. Found along rivers and near springs. Quite resistant to salinity, it also grows...

A very common plant in freshwater wetlands and minor waterways producing the showy yellow blooms of this species in April-May.

A species of evergreen oak, it is the main constituent of the Mediterranean maquis and locally can be found between the Timavo river and Miramare...

It may be found along rivers, near springs and accompanying the minor waterways of wetlands and peaty terrain. It can form pure forests in...

A tree species common along the rivers and coasts especially on sandy soils. Offering a fine form, it is used to line boulevards and decorate...

Like the white poplar, it is common along rivers and coasts, but is less tied to sandy soils. A hybrid variety is grown in poplar groves for the...

A North American species common in cultivated areas and along rivers. Used for poles and firewood.

Frequent in many areas even away from water. Together with poplars, it is one of the main species in riparian forests and floodplains.

A shrub or small tree of rounded form normally present along waterways near springs, and amidst reeds on peaty and often flooded soils.

A shrub and small tree, it is resistant to drought and salty soils as mentioned by D’Annunzio in the poem “la pioggia nel...

Frequent in the sea at a depth of less than 5 metres and in lagoons, especially where there are fresh water inlets. It colonises tidal flats,...

In ancient times, there used to be a wide stretch of navigable sea opposite the springs of the Timavo, known as the Lacus Timavi, roughly covering...

At the mouth of the Isonzo and in the lagoon of Marano there are large areas of delta with strips of riparian forest and large reed beds that give...

The Carso is a long plateau facing SE-NW, sloping slightly downwards towards the west. The eastern part reaches about 400 metres in height, while...

One of the largest and most vital underwater meadows of the Gulf lies in front of the mouths of the Isonzo. These are plants with ribbon-like...

84-102 cm, sexes similar. All year round, nesting in colonies in lagoon groves and other wooded areas inland. Nesting has been noted since 1999. Very...

45-55 cm, marked dimorphism, the male is grey with black wing tips, the female brown, and both have a white rump. Present during migration and...

19-21 cm, sexes similar. There is a grey variety and a rufous one. It is a small owl with ear tufts and a characteristic and insistent song. Present...

23-28 cm, sexes similar. With well-camouflaged streaked brown plumage, it has a long beak and a characteristic zig-zag flight. Present from July to...

37-43 cm, sexes similar, light grey upperparts, white in the lower parts, with a black cap and a tuft on the head, the beak black with light-coloured...

12.5-14 cm, light brown plumage with pale belly. Present from April to September in the reeds where it nests. It is the most common species of...

16-20 cm, sexes similar. Light brown with whitish underparts. Present from April to September in the reeds where it nests. Its loud song...

48-57 cm, sexes similar. Brownish with a long curved beak. Present throughout the year but does not nest. Forms flocks during high tide on sandbars...

37-45 cm, sexes similar. Brownish with curved beak, shorter than the curlew, and with characteristic dark streaks on the head. Present during...

140-160 cm, white, grey in juveniles, tubercle at the base of the beak, most evident in males. Present throughout the year, numerous at river mouths...

51-62 cm, an elegant duck with long neck and, in the male, long central tail feathers. A wintering species, it frequents tidal flats, the restored...

38-43 cm sexes similar, grey with white wing bands. Present throughout the year, it commonly nests in the groves of the lagoon islands and in...

77-94 cm, sexes similar. Like pelicans and boobies, they have the 4 fingers joined by a membrane to facilitate swimming. The species is present...

15-16 cm, the male with grey head and white throat in the cinerocapilla subspecies, yellow belly, long tail with white outer feathers. During...

60-70 cm, the male with black and white plumage. A permanent population lives between the mouth of the Isonzo and that of the Timavo. Some pairs have...

43-55 cm, marked dimorphism, with the male more colourful while the female is dark with pale-yellow head and shoulders. Present throughout the year,...

42-50 cm, the male with a characteristic white spot on the wing coverts. A very numerous wintering species from September to March, some individuals...

36-42 cm, sexes similar. Sooty black in colour with white beak and frontal shield. It runs over the water to take flight. Present throughout the...

35-39 cm, sexes similar. In February, it gains the dark brown cap for the breeding season, which it then loses in July-August. Present throughout the...

37-40 cm, sexes similar. Compared to the black-headed gull, the beak is more massive and coral-red, it has a black head – during nesting – and...

52-58 cm, sexes similar. Grey upperparts, white lower parts. Present throughout the year and abundant, nesting in the lagoon, on the roofs of houses...

27-31 cm, sexes similar. Dark with tail in part white and red and yellow beak. Present throughout the year, it nests in freshwater and brackish...

55-65 cm, sexes similar. White plumage with long feathers on the neck and back during the breeding season. Present throughout the year round, nesting...

40-46 cm, sexes similar. It is smaller than the black-headed gull. Present from November to April, numerous in some winters, it frequents the sea,...

50-60 cm. With marked dimorphism, this is the ancestor of the domestic duck. Present throughout the year, it is very adaptable, frequenting both...

37-44 cm, sexes similar. It has several colour morphs, a dark one – almost totally dark brown – and a light one with dark cap and whitish...

68-78 cm, sexes similar. It has a short tuft that appears in adults in winter and early spring. Present throughout the year, it becomes rare in...

17-19 cm, sexes similar. Blue upperparts, red underparts with large, dark beak dark and very short tail, which in flight makes it resemble a...

13.5-15.5 cm - the male in wedding dress has a black head. In winter, the plumage of both sexes are the same, of a brownish coloure and with...

22-26 cm, sexes similar. Dark grey on the wings and blackish body, with pointed wings. Present from April to September, does not nest. It frequents...

58-65 cm, sexes similar, the adult black and grey, the juveniles brown. Present from spring to autumn, rare in winter. It nests in colonies...

30-34 cm, sexes similar. Grey above, whitish beneath, slightly upturned and relatively large beak. Present throughout the year, scarce from mid-May...

10-11.5 cm, sexes similar. Grey head with a black eye streak. “Theoretically” present throughout the year in reed beds and riparian woods, now...

24-27 cm, sexes similar. Grey-brown uppers, lighter beneath with evident white bar on the wings, darker in breeding season; red beak and legs....

18 to 20.5 cm light brown uppers. white on the lower parts. The wings have a narrow light-coloured bar and are often blocked briefly in flight....

48-56 cm, sexes similar, plumage varies widely, generally brown with light patches. Present all year round, most numerous even in the largest lagoon...

23-26 cm, sexes similar. Grey under parts, brown stripes on uppers, long, curved beak. Present throughout the year, it is more numerous in winter and...

17-21 cm, sexes similar. Black upperparts, red throat and whitish belly. Present from March to April and from September to October, it nests in rural...

52-58 cm, the male with dark green head and white neck, the female with reddish head. Present during wintering, it is frequent during the spring...

34-37 cm, sexes similar. Light grey upperparts and white underparts, with black cap and red beak. It is the classic tern, frequent from April to...

63-75 cm, sexes similar. In winter the plumage is dark grey above, whitish underneath; the beak is more massive and held flat compared to the...

55-67 cm, sexes similar. In winter, the plumage is grey, and whitish underneath. Present in winter at sea and in the deepest areas of the lagoons....

46-51 cm, sexes similar. Grey upper part, whitish beneath, while in its nuptial plumage it reveals obvious tufts on the head and below the eyes....

28-34 cm, sexes similar. Grey and off-white in winter, in March it has a black neck and a yellow tuft behind a red eye. Present from August to April,...

22-28 cm, the male yellowish and black on the head, back and wings, the female similar but with brownish instead of black. It is the smallest...

69-81 cm, sexes similar. Camouflaged plumage. Present during wintering and migration. It nests here occasionally. Frequents freshwater wetlands with...

29-33 cm, sexes similar. Plumage light beige with black collar. Present all year round, often associated with human settlements in cities, towns and...

23-29 cm, sexes similar, brown in winter, black with rufous cheeks in the breeding season. Present throughout the year, it nests in freshwater...

25-29 cm, sexes similar, orange plumage striped with black, erectile crest on the head, flickering flight. Present from April to September and fairly...

15-16.5 cm, sexes similar. Reddish brown upperparts, and light in underparts. Present from April to September. It nests in coastal and riparian...

13-14 cm, sexes similar. Reddish brown plumage, loud, crackling song, especially when a human intrudes on the territory of a male. Present throughout...