NEW MEXICO - New Mexico is facing a unique set of biological challenges. From a "creeping" threat at the southern border to the seasonal return of apex predators and venomous reptiles, the New Mexico Department of Agriculture (NMDA) and Department of Game and Fish (NMDGF) have issued several critical briefings this month.
Whether you are hiking the Sandias or ranching in the Bootheel, here is what is on the move right now.
1. New World Screwworm: The Border Watch
The most significant agricultural alert for April 2026 involves the New World Screwworm (NWS). While NWS was eradicated from the U.S. decades ago, a major resurgence in Central America and Mexico has put New Mexico on high alert.
- The Threat: As of April 21, 2026, active cases have been confirmed in the Mexican state of Nuevo León, just 62 miles from the U.S. border.
- The Danger: Screwworm larvae (maggots) feed on the living tissue of warm-blooded animals, including livestock, pets, and occasionally humans. They enter through tiny wounds or even tick bites, causing rapidly progressing, painful, and often fatal infections.
- Action Plan: The NMDA is urging livestock producers and pet owners to inspect animals daily for wounds. If you see unusual larval activity, do not treat it yourself—contact your veterinarian or the New Mexico Livestock Board at 505-841-6161 immediately.
2. Rattlesnake Re-emergence: Early and Active
April marks the peak of snake emergence in the Chihuahuan Desert. Reports from early April 2026 indicate that sightings are higher than average this year due to a series of warm spring days.
Western Diamondback and Mojave Rattlesnakes These are the primary species moving across the landscape right now. They are transitioning from their winter dens to find food and mates.
- The "Headphone" Warning: Local experts are stressing "situational awareness." If you hike with headphones, keep one ear open. A rattlesnake’s buzz is its only warning before it feels the need to defend itself.
- Safety Tip: If you encounter a snake, back away slowly. Most bites occur when people try to kill or relocate the snake themselves. Give them at least 5 to 6 feet of space.
3. Black Bears: The "Spring Green-up" Alert
The NMDGF issued a reminder on April 2, 2026, as black bears officially emerge from hibernation. With natural food sources still scarce in the high elevations, bears are moving into lower valleys and residential areas.
- The Conflict: Hungry bears are currently targeting "easy calories" like bird feeders, unsecured trash, and pet food.
- The Rule: Take down bird feeders now. In New Mexico, once a bear becomes "habituated" to human food, it often becomes a safety risk and must be euthanized.
- Hunter Note: If you are a bear hunter, remember the mandatory 5-day pelt tagging requirement. Offices are currently closing at 4 p.m. to accommodate these spring harvest reports.
4. Biting Insects: The 2026 Forecast
Despite the "rollercoaster" temperatures of spring 2026, health officials have noted that mosquito and tick activity is ramping up earlier than usual.
- Tick Surge: Deer ticks have been active since early March. In April, the primary concern is the nymph stage—these are the size of a poppy seed and are the most likely to transmit Lyme disease or Anaplasmosis because they are so hard to spot.
- Mosquito Control: Aerial larvicide treatments (using drones and helicopters) are scheduled to begin the week of April 20, 2026, in larger wetlands to knock down populations before the mid-summer surge.
- Prevention: Tip over any standing water in your yard every 3 to 5 days to stop the breeding cycle before the biting adults emerge.
5. 2026 Biennial Review: Endangered Species Update
On April 6, 2026, the NMDGF officially opened its Biennial Review of the State List of Threatened and Endangered Wildlife.
- Why It Matters: This review determines which species receive state protection. If you frequent New Mexico’s backcountry, staying informed on these species helps you avoid accidentally disturbing critical habitats for animals like the Gila monster or various native birds.
- Action: Public comments are being accepted through July 6, 2026.
Summary Checklist for New Mexico Residents
- Inspect Your Animals: Check livestock and pets for any open wounds to prevent Screwworm infestation.
- Bear-Proof Your Yard: Remove bird seed and secure your trash; hungry bears are currently scouting neighborhoods.
- Snake Awareness: Wear closed-toe shoes and stay on wide, well-used trails when hiking.
- Tick Hygiene: Perform a full-body scan every night, especially if you’ve been in tall grass or wooded areas.