Overview
See native range and biology below. [1]
Native range
India, Nepal, Pakistan; released in Texas ~1930. [1]
Size
120–240 kg; 120–150 cm at shoulder. [1]
Lifespan
~21 years in captivity. [1]
Breeding & gestation
240–258 days; twins common; females can conceive at 18 months. [1]
Temperament & social structure
Not verified from a primary source for this page.
Habitat needs
Not verified from a primary source for this page.
Where they thrive (Texas / US)
Documented free-ranging in South Texas: Kenedy and Willacy counties, and Hidalgo/Cameron (2021 freeze survey). Freezes with 11+ hours below −3 °C caused significant mortality and are expected to limit spread north and west. See the interactive Texas species map (../site/map.html). [1][2]
Space per animal
No verified species-specific stocking rate was found. Carrying capacity depends on rainfall, range condition and competing grazers—get a range/stocking assessment (NRCS or Texas A&M AgriLife).
Housing & shelter
Cold-limited: mortality documented after 11+ hours below −3 °C (27 °F); provide brush cover/windbreaks. [2]
Fencing
Texas Parks & Wildlife states game fences at least 8 ft high (woven-wire or high-tensile) are the only fully reliable deer-exclusion fence. That is the common high-fence standard for deer and antelope; a species-specific minimum for this animal was not found in a primary source. [3]
Natural diet
Not verified from a primary source for this page.
Feed & supplementation
No verified species-specific protein % or mineral formula was found. Texas deer guidance (16–20% CP pellet; 13–16% CP for growth/reproduction) is sometimes used as a reference point but is not antelope-specific—work with a ruminant nutritionist/exotic vet. [4][5]
Common health issues & parasites
Competent host of southern cattle fever tick (Rhipicephalus microplus); USDA lists no approved treatment protocol for nilgai. Haemonchus contortus and Longistrongylus dominate abomasal worm burdens in free-ranging exotic antelope in Texas (sable, addax, blesbok studied); captive wild ruminants show anthelmintic resistance, so use fecal egg counts and fecal egg-count reduction tests instead of routine blanket deworming. [6][2][7]
Vet care & vaccination
No vaccines are labeled for this species in the US; any vaccination protocol is extra-label and should be set by a veterinarian experienced with exotic hoofstock. (No specific protocol was verified for this page.)
Handling & capture
Capture myopathy—muscle damage from pursuit, restraint and transport—is often fatal in wild ungulates. Minimize chase time and stress, avoid hot conditions, use appropriate chemical immobilization by a vet, and release/unload quickly. [8]
Conservation status
IUCN Red List: Least Concern. [9]
Legal notes (general info, not legal advice)
In fever-tick quarantine areas, nilgai (live or hides/capes/heads) must be inspected/treated by TAHC or USDA and need a movement permit. General information, not legal advice. USDA APHIS licensing under the Animal Welfare Act applies to dealers and exhibitors; check USDA and your state wildlife and animal-health agencies before buying, moving or selling. [10][6][11][12]
Sources
- Animal Diversity Web (Univ. of Michigan) – Boselaphus tragocamelus
- Goolsby et al. 2021, Nilgai mortality in South Texas after historic freeze (USDA-ARS)
- TPWD, Local Control Methods (deer damage): 8-ft woven-wire/high-tensile game fence
- TPWD, Specific Habitat Management Practices – White-tailed Deer (16–20% protein pellet; corn 7–10% CP)
- Tomeček, Texas A&M AgriLife Extension – Deer & goat co-management (6–7% CP maintenance; 13–16% CP growth/antlers/reproduction)
- USDA APHIS – Cattle Fever Ticks: wildlife species (no approved nilgai treatment protocol)
- Longistrongylus/Haemonchus in free-ranging exotic antelope in Texas (J. Wildl. Dis., PubMed 8355363)
- Breed et al. 2019, Understanding capture myopathy (Conservation Physiology, PMC6612673)
- IUCN Red List – Boselaphus tragocamelus (assessment page)
- TAHC – Cattle Fever Tick inspection, treatment & movement requirements
- TAHC Complete Rules (4 TAC Part 2; Ch. 40 CWD §40.5 movement/ID/reporting; Ch. 41 Fever Ticks)
- USDA APHIS – Animal Welfare Act licensing & registration
Figures are taken from the numbered sources; items marked "not verified" could not be confirmed from a primary source and are intentionally left blank. Husbandry guidance is general—confirm with an exotic-animal veterinarian.