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The site was identified as important in 2021 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
Northern Bobwhite Colinus virginianus	NT	resident	2017	129 individuals	B1a
Wood Stork Mycteria americana	LC	passage	2011	900 individuals	A4, B3a
White Ibis Eudocimus albus	LC	breeding	2011	6,000 individuals	A4, B3a
Reddish Egret Egretta rufescens	NT	resident	2015	829 individuals	A4, B1a, B3a
Snowy Egret Egretta thula	LC	breeding	2011	10,500 individuals	A4, B3a
Magnificent Frigatebird Fregata magnificens	LC	resident	2017	8,000 individuals	A4, B3a
Neotropical Cormorant Nannopterum brasilianum	LC	breeding	2011	13,000 individuals	B3a
Semipalmated Plover Charadrius semipalmatus	LC	winter	2010-2015	9,120 individuals	A4, B3a
Snowy Plover Charadrius nivosus	NT	winter	2010	170 individuals	B1a
Red Knot Calidris canutus	NT	winter	2018	532 individuals	B1a, B3a
Semipalmated Sandpiper Calidris pusilla	NT	winter	2013	4,010 individuals	B1a
Western Sandpiper Calidris mauri	LC	winter	2018	54,188 individuals	A4, B3a
Short-billed Dowitcher Limnodromus griseus	VU	winter	2018	4,300 individuals	A4, B3a
Willet Tringa semipalmata	LC	winter	2018	8,519 individuals	A4, B3a
Greater Yellowlegs Tringa melanoleuca	NT	winter	2018	4,930 individuals	A4, B3a
Black Skimmer Rynchops niger	LC	winter	2018	740 individuals	B3a
Common Gull-billed Tern Gelochelidon nilotica	LC	winter	2011	80 individuals	B3a
Black Tern Chlidonias niger	LC	passage	2011	20,000 individuals	A4, B3a
Elegant Tern Thalasseus elegans	NT	winter	2018	30 individuals	B1a
Royal Tern Thalasseus maximus	LC	winter	2013	200 individuals	B3a
Turkey Vulture Cathartes aura	LC	passage	2011	104,850 individuals	A4, B3a
Broad-winged Hawk Buteo platypterus	LC	passage	2011	65,330 individuals	A4, B3a
Swainson's Hawk Buteo swainsoni	LC	passage	2011	75,920 individuals	A4, B3a
Lilac-crowned Amazon Amazona finschi	EN	resident	2018	23 individuals	A1
Orange-fronted Parakeet Eupsittula canicularis	VU	resident	2019	373 individuals	A1
Cinnamon-tailed Sparrow Peucaea sumichrasti	NT	resident	2020	221 individuals	B1a
Eastern Meadowlark Sturnella magna	NT	resident	2020	152 individuals	B1a
Rose-bellied Bunting Passerina rositae	NT	resident	2016	94 individuals	B1a
A4iv Species group - soaring birds/cranes	n/a	winter	2011	247,000 individuals	B3c
A4iii Species group - waterbirds	n/a	winter	2018	73,209 individuals	B3b

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2021) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2021. The most recent assessment (2013) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Energy production and mining	happening now	majority/most of area/population (50-90%)	very rapid to severe deterioration	very high
Human intrusions and disturbance	happening now	majority/most of area/population (50-90%)	very rapid to severe deterioration	very high
Agricultural expansion and intensification	likely in short term (within 4 years)	majority/most of area/population (50-90%)	very rapid to severe deterioration	high
Transportation and service corridors	happening now	some of area/population (10-49%)	slow but significant deterioration	medium

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Little/none of site covered (<10%)	No management planning has taken place	Very little or no conservation action taking place	negligible

Year	Protected Area	Designation	% overlap with IBA
1995	La Sepultura	Reserva de la Biosfera	2
1995	La Sepultura	Zona Sujeta a Conservación Ecológica	<1
1998	Parque Ecológico Regional del Itsmo	Parque Estatal	<1
2002	Playa de Puerto Arista	Santuario	<1
2006	La Sepultura	UNESCO-MAB Biosphere Reserve	2
2007	El Bejucal y la Chichihua	Área Destinada Voluntariamente a la Conservación	<1
2008	Sistema Estuarino Puerto Arista	Ramsar Site, Wetland of International Importance	4
2010	El Cordón del Retén	Área Destinada Voluntariamente a la Conservación	<1
2010	(Parcela) 70 Z-1 P1-1 (Ejido Chivela)	Área Destinada Voluntariamente a la Conservación	<1
2012	Área de Uso Común del Núcleo Agrario El Barrio de La Soledad	Área Destinada Voluntariamente a la Conservación	<1
2012	Parcela N° 349 Z-l P1/1	Área Destinada Voluntariamente a la Conservación	<1
2012	San José de Los Amates	Área Destinada Voluntariamente a la Conservación	<1
2014	Parcela No 221 Z-1 P1/1	Área Destinada Voluntariamente a la Conservación	<1
2014	Parcela No 262 Z-1 P1/1	Área Destinada Voluntariamente a la Conservación	<1
2014	Parcela No 22 Z-1 P1/1	Área Destinada Voluntariamente a la Conservación	<1
2014	Parcela No 93 Z-1 P1/1	Área Destinada Voluntariamente a la Conservación	<1
2015	Los Naranjos	Área Destinada Voluntariamente a la Conservación	<1
2015	El Diamante	Área Destinada Voluntariamente a la Conservación	<1
2016	La Herradura	Área Destinada Voluntariamente a la Conservación	<1
2017	Zona de Uso Común 1 y 2	Área Destinada Voluntariamente a la Conservación	<1

Habitat1	Habitat detail	% of IBA
Forest	Gallery & riparian, Mangrove, Montane broadleaf evergreen, Palm forest, Pine, Pine-oak, Temperate deciduous, Tropical deciduous, Tropical lowland evergreen, Tropical semi-deciduous	40
Grassland	Second-growth & grazed	7
Savanna		5
Marine Coastal/Supratidal		major (>10)
Marine Intertidal		major (>10)

1. IUCN Habitat classification.

Land use	% of IBA
agriculture	31
urban/industrial/transport	1

Zona Federa Marítimo Terrestre

Comunal/Ejidal

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Istmo de Tehuantepec - Mar Muerto (Mexico). Downloaded from https://datazone.birdlife.org/site/factsheet/istmo-de-tehuantepec--mar-muerto-iba-mexico on 22/11/2024.