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The site was identified as internationally important for bird conservation in 2002 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Great Crested Grebe Podiceps cristatus	LC	winter (1997–2001)	1,236 birds	C3
Black-necked Grebe Podiceps nigricollis	LC	winter (1997–2001)	1,830 birds	A4i, B1i, C3
Common Little Bittern Ixobrychus minutus	LC	breeding (2001)	20–30 pairs	C6
Black-crowned Night Heron Nycticorax nycticorax	LC	winter (1999)	present	C6
Black-crowned Night Heron Nycticorax nycticorax	LC	breeding (1999)	305–526 pairs	C2, C6
Squacco Heron Ardeola ralloides	LC	breeding (2001)	50–100 pairs	C2, C6
Purple Heron Ardea purpurea	LC	breeding (2001)	170–330 pairs	C2, C6
Great White Egret Ardea alba	LC	winter (1997–2001)	483 birds	C6
Little Egret Egretta garzetta	LC	winter (1997–2001)	791–1,284 birds	C6
Little Egret Egretta garzetta	LC	breeding (2001)	550–800 pairs	C6
Pied Avocet Recurvirostra avosetta	LC	breeding (1999)	100–200 pairs	C6
Pied Avocet Recurvirostra avosetta	LC	winter (1997–2001)	present	C6
Black-winged Stilt Himantopus himantopus	LC	breeding (2001)	100–150 pairs	C6
Dunlin Calidris alpina	NT	winter (1997–2001)	3,917 birds	A4i, B1i, C3
Little Tern Sternula albifrons	LC	passage (1991)	2,000–3,000 birds	A4i, B1i, C2
Little Tern Sternula albifrons	LC	breeding (1991)	1,000–1,500 pairs	C6
Common Tern Sterna hirundo	LC	breeding (2000–2001)	158–310 pairs	C6
Common Tern Sterna hirundo	LC	passage (2001)	1,000–2,000 birds	B1i, C2
Common Gull-billed Tern Gelochelidon nilotica	LC	breeding (2001)	80–90 pairs	C2, C6
Sandwich Tern Thalasseus sandvicensis	LC	passage (1999)	1,000–2,000 birds	B1i, C2
Sandwich Tern Thalasseus sandvicensis	LC	winter (1999)	2 birds	C6
Western Marsh-harrier Circus aeruginosus	LC	winter (1997–2001)	56–73 birds	C6
Western Marsh-harrier Circus aeruginosus	LC	breeding (1999)	10–20 pairs	C6
Montagu's Harrier Circus pygargus	LC	breeding (2001)	13–18 pairs	C6
A4iii Species group - waterbirds	n/a	passage (1999)	26,000–37,000 birds	A4iii, C4

Year	Protected Area	Designation (management category)	% coverage of IBA
-	Bonello Cornerona	State Nature Reserve (-)	-
-	Bonello Giozzette	State Nature Reserve (-)	-
-	Cà Mello	Private Reserve (-)	<1
-	Biotopo Bonello	Private Reserve (-)	<1
-	Bonello Bacucco	State Nature Reserve (-)	-
1977	Riserva naturale Bocche di Po	Riserva naturale regionale/provinciale (IV)	1
1977	Bocche di Po	State Nature Reserve (-)	1
1977	Bonello Cà Zuliani	State Nature Reserve (-)	<1
1988	Delta del Po	Regional Nature Park (-)	-
1997	Parco regionale del Delta del Po (VE)	Parco naturale regionale/provinciale (V)	16

Habitat	% of IBA	Habitat detail
Marine Neritic	8
Artificial/Terrestrial	5	Highly improved re-seeded landscapes; Arable land
Forest	2	Alluvial and very wet forest
Marine Coastal/Supratidal	major (>10)
Marine Intertidal	major (>10)

Land use	% of IBA
fisheries/aquaculture	70
hunting	70
tourism/recreation	20
agriculture	3
urban/industrial/transport	1
water management	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Po Delta (Italy). Downloaded from https://datazone.birdlife.org/site/factsheet/po-delta-iba-italy on 23/12/2024.