Marsh Deer

Marsh Deer

Blastocerus dichotomus

Silhouette: Steven Traver · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Daily sighting probability ~80% · Very likely
at Iberá National Park
405 Verified sightings at Iberá National Park From 2019 to 2026
449 Verified sightings across all 3 parks From 2019 to 2026
May Best month highest sighting rate
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the Marsh Deer

The marsh deer (Blastocerus dichotomus) is a species of deer native to South America. It is the largest living species of South American deer. It is the only species in the genus Blastocerus. It is found in Argentina, Bolivia, Peru, Brazil, Uruguay and Paraguay. Formerly found in much of tropical and subtropical South America, it ranged east of the Andes, south from the Amazon rainforest, west of the Brazilian Atlantic rainforest and north of the Argentinian Pampa. Today it is largely reduced to isolated populations at marsh and lagoon zones in the Paraná, Paraguay, Araguaia and Guapore river basins. Small populations also occur in the southern Amazon, including Peru where protected in Bahuaja-Sonene National Park. It is listed as a vulnerable species by the IUCN and is protected under CITES Appendix I.

Marsh deer resemble the North American mule deer or blacktail deer. They possess very large ears lined with white hairs, red-gold to tawny brown fur, blackish eyes and long dark legs. The hair turns darker during winter. There are also white marks on the hips and around the eyes. The legs are black below the tarsal as is the muzzle. The tail... Wikipedia →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Iberá National Park 🇦🇷 Argentina
~80%
2 Parque Estadual Encontro das Águas 🇧🇷 Brazil
~30%
3 Emas National Park 🇧🇷 Brazil
~30%

Quick answers

What are the chances of seeing a Marsh Deer in Iberá National Park?

About 80% of wildlife watchers report a Marsh Deer sighting in Iberá National Park, based on 405 verified sightings from GBIF citizen-science data.

When is the best time to see Marsh Deer in Iberá National Park?

May has the highest sighting rate for Marsh Deer in Iberá National Park in our monthly data.

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