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The site was identified as important 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 List1	Season	Year(s)	Size	IBA criteria
Great Crested Grebe Podiceps cristatus	LC	winter	1997-2001	1,236 individuals	C3
Black-necked Grebe Podiceps nigricollis	LC	winter	1997-2001	1,830 individuals	A4i, B1i, C3
Common Little Bittern Ixobrychus minutus	LC	breeding	2001	20-30 breeding pairs	C6
Black-crowned Night Heron Nycticorax nycticorax	LC	winter	1999	present	C6
Black-crowned Night Heron Nycticorax nycticorax	LC	breeding	1999	305-526 breeding pairs	C2, C6
Squacco Heron Ardeola ralloides	LC	breeding	2001	50-100 breeding pairs	C2, C6
Purple Heron Ardea purpurea	LC	breeding	2001	170-330 breeding pairs	C2, C6
Great White Egret Ardea alba	LC	winter	1997-2001	483 individuals	C6
Little Egret Egretta garzetta	LC	winter	1997-2001	791-1,284 individuals	C6
Little Egret Egretta garzetta	LC	breeding	2001	550-800 breeding pairs	C6
Pied Avocet Recurvirostra avosetta	LC	breeding	1999	100-200 breeding pairs	C6
Pied Avocet Recurvirostra avosetta	LC	winter	1997-2001	present	C6
Black-winged Stilt Himantopus himantopus	LC	breeding	2001	100-150 breeding pairs	C6
Dunlin Calidris alpina	NT	winter	1997-2001	3,917 individuals	A4i, B1i, C3
Little Tern Sternula albifrons	LC	passage	1991	2,000-3,000 individuals	A4i, B1i, C2
Little Tern Sternula albifrons	LC	breeding	1991	1,000-1,500 breeding pairs	C6
Common Tern Sterna hirundo	LC	breeding	2000-2001	158-310 breeding pairs	C6
Common Tern Sterna hirundo	LC	passage	2001	1,000-2,000 individuals	B1i, C2
Common Gull-billed Tern Gelochelidon nilotica	LC	breeding	2001	80-90 breeding pairs	C2, C6
Sandwich Tern Thalasseus sandvicensis	LC	passage	1999	1,000-2,000 individuals	B1i, C2
Sandwich Tern Thalasseus sandvicensis	LC	winter	1999	2 individuals	C6
Western Marsh-harrier Circus aeruginosus	LC	winter	1997-2001	56-73 individuals	C6
Western Marsh-harrier Circus aeruginosus	LC	breeding	1999	10-20 breeding pairs	C6
Montagu's Harrier Circus pygargus	LC	breeding	2001	13-18 breeding pairs	C6
A4iii Species group - waterbirds	n/a	passage	1999	26,000-37,000 individuals	A4iii, C4

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2002) may differ.

Year	Protected Area	Designation	% overlap with IBA
-	Cà Mello	Private Reserve	<1
-	Bonello Giozzette	State Nature Reserve	-
-	Bonello Cornerona	State Nature Reserve	-
-	Bonello Bacucco	State Nature Reserve	-
-	Biotopo Bonello	Private Reserve	<1
1977	Riserva naturale Bocche di Po	Riserva naturale regionale/provinciale	1
1977	Bonello Cà Zuliani	State Nature Reserve	<1
1977	Bocche di Po	State Nature Reserve	1
1988	Delta del Po	Regional Nature Park	-
1996	Delta del Po: tratto terminale e delta veneto	Site of Community Importance (Habitats Directive)	34
1997	Parco regionale del Delta del Po (VE)	Parco naturale regionale/provinciale	16
1997	Fiume Po da Stellata a Mesola e Cavo Napoleonico	Special Protection Area (Birds Directive)	<1
2003	Delta del Po	Special Protection Area (Birds Directive)	36
2003	Fiume Po da Stellata a Mesola e Cavo Napoleonico	Site of Community Importance (Habitats Directive)	<1

Habitat1	Habitat detail	% of IBA
Marine Neritic		8
Artificial/Terrestrial	Highly improved re-seeded landscapes, Arable land	5
Forest	Alluvial and very wet forest	2
Marine Coastal/Supratidal		major (>10)
Marine Intertidal		major (>10)

1. IUCN Habitat classification.

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 23/11/2024.