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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
Eurasian Bittern Botaurus stellaris	LC	breeding	2001	15 breeding pairs	C6
Black-crowned Night Heron Nycticorax nycticorax	LC	breeding	2000	2,400 breeding pairs	A4i, B1i, B2, C2, C6
Squacco Heron Ardeola ralloides	LC	breeding	2000	28 breeding pairs	C2, C6
Purple Heron Ardea purpurea	LC	breeding	2000	69 breeding pairs	C2, C6
Little Egret Egretta garzetta	LC	breeding	2000	3,599 breeding pairs	A4i, B1i, C2, C6

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
1984	Riserva naturale Garzaia di Villa Biscossi	Riserva naturale regionale/provinciale	<1
1984	Riserva naturale Garzaia di Porta Chiossa	Riserva naturale regionale/provinciale	<1
1984	Garzaia di Villa Biscossi	Regional Nature Reserve	<1
1984	Garzaia di Porta Chiossa	Regional Nature Reserve	<1
1986	Monumento naturale Garzaia di Sant' Alessandro	Altre Aree Naturali Protette Regionali	1
1986	Riserva naturale Abbazia Acqualunga	Riserva naturale regionale/provinciale	1
1986	Monumento naturale Garzaia di Celpenchio	Altre Aree Naturali Protette Regionali	<1
1986	Monumento naturale Garzaia della Cascina Notizia	Altre Aree Naturali Protette Regionali	<1
1986	Riserva naturale Garzaia del Bosco Basso	Riserva naturale regionale/provinciale	<1
1986	Monumento naturale Garzaia della Rinalda	Altre Aree Naturali Protette Regionali	<1
1986	Garzaia del Bosco Basso	Regional Nature Reserve	<1
1986	Garzaia di Celpenchio	Regional Nature Reserve	<1
1986	Garzaia di Acqualunga	Regional Nature Reserve	<1
1986	Garzaia di Sant'Alessandro	Regional Nature Reserve	1
1986	Garzaia della Cascina Notizia	Regional Nature Reserve	<1
1986	Garzaia della Roggia Torbida	Regional Nature Reserve	<1
1986	Garzaia della Rinalda	Regional Nature Reserve	<1
1987	Riserva naturale Palude Loja	Riserva naturale regionale/provinciale	<1
1988	Monumento naturale Garzaia della Cascina Verminesca	Altre Aree Naturali Protette Regionali	1
1988	Riserva naturale Garzaia della Cascina Isola	Riserva naturale regionale/provinciale	<1
1988	Garzaia della Verminesca	Regional Nature Reserve	1
1988	Garzaia della Cascina Isola	Regional Nature Reserve	<1
1989	Monumento naturale Garzaia della Cascina Villarasca	Altre Aree Naturali Protette Regionali	<1
1989	Riserva naturale Garzaia della Carola	Riserva naturale regionale/provinciale	<1
1989	Garzaia della Carola	Regional Nature Reserve	<1
1995	Abbazia Acqualunga	Site of Community Importance (Habitats Directive)	1
1995	Garzaia di Celpenchio	Site of Community Importance (Habitats Directive)	<1
1995	Garzaia della Carola	Site of Community Importance (Habitats Directive)	<1
1995	Garzaia di Porta Chiossa	Site of Community Importance (Habitats Directive)	<1
1995	Garzaia della Rinalda	Site of Community Importance (Habitats Directive)	<1
1995	Garzaia di Sartirana	Site of Community Importance (Habitats Directive)	1
1995	Garzaia della Cascina Notizia	Site of Community Importance (Habitats Directive)	<1
1995	Garzaia di S. Alessandro	Site of Community Importance (Habitats Directive)	1
1995	Garzaia del Bosco Basso	Site of Community Importance (Habitats Directive)	<1
1995	Agogna Morta (Borgolavezzaro)	Site of Community Importance (Habitats Directive)	<1
1995	Garzaia della Verminesca	Site of Community Importance (Habitats Directive)	1
1995	Palude Loja	Site of Community Importance (Habitats Directive)	<1
1997	Risaie della Lomellina	Special Protection Area (Birds Directive)	100
2004	Garzaia di Cascina Villarasca	Special Protection Area (Birds Directive)	<1
2004	Garzaia della Carola	Special Protection Area (Birds Directive)	<1
2004	Garzaia di Porta Chiossa	Special Protection Area (Birds Directive)	<1
2006	Garzaia di Cascina Villarasca	Site of Community Importance (Habitats Directive)	<1

Habitat1	Habitat detail	% of IBA
Forest	Broadleaved deciduous woodland, Alluvial and very wet forest	70
Artificial/Terrestrial	Highly improved re-seeded landscapes, Arable land, Ruderal land	20
Wetlands (inland)	Standing freshwater, Rivers and streams, Water fringe vegetation	7
Grassland	Humid grasslands	3

1. IUCN Habitat classification.

Land use	% of IBA
nature conservation and research	80
forestry	30
hunting	20
agriculture	10
tourism/recreation	10
water management	10
fisheries/aquaculture	5

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Lomellina and Heronries of Pavia province (Italy). Downloaded from https://datazone.birdlife.org/site/factsheet/lomellina-and-heronries-of-pavia-province-iba-italy on 23/11/2024.