Elk Research · By Josh Forcier · 7 min read · Updated 2026-09-30
Elk Calf Survival Study: Climate, Predators, and Calving Habitat
What a study of 1,999 elk calves found about early mortality, predator timing, and climate, and what it means for scouting.
Griffin et al. 2011 studied neonatal elk mortality across climate, predator phenology, and predator community composition. The Journal of Animal Ecology paper is "Neonatal mortality of elk driven by climate, predator phenology and predator community composition" (DOI: 10.1111/j.1365-2656.2011.01856.x).
This is not a how-to guide for hunting calves. It is a scouting guide for understanding why cow elk and calf-rearing groups may value certain habitats, timing windows, and security patterns after birth.
Calving habitat is about more than hiding cover
The study linked calf survival to weather, predator timing, and the predator community. It did not measure habitat or cover, so the scouting advice below is our interpretation, not a study finding.
For scouting, that means calf-rearing country should be evaluated as a system. Look for security cover near feed, water, gentle terrain, and enough visibility or escape structure for cows to manage risk.
Timing matters because predators have timing too
The study emphasizes predator phenology, which means the seasonal timing of predator activity matters alongside elk birth timing. Risk is not static across spring and early summer.
During hunting seasons, the same idea helps interpret cow-calf groups. Their current location may reflect earlier survival tradeoffs, later forage needs, or pressure avoidance rather than one simple habitat preference.
Climate can reshape early-life conditions
Weather affects snow, plant growth, exposure, and the timing of seasonal transitions. In this study, hotter previous summers lowered calf survival, and May rain helped survival only where four or five predator species were present.
Map work should account for summer heat, spring green-up, elevation, and aspect. If conditions were harsh or late, cow-calf distribution may lean harder into lower-stress feed and cover combinations.
What the study measured
The study pooled 1,999 radio-marked elk calves from 12 study areas in five northwestern states, with data collected from 1973 to 2007. Across all areas, 61% of calves survived their first 3 months, falling from 65% where black bears, cougars, and coyotes were the main predators to 55% where wolves were added and 50% where grizzly bears were also present. Of 671 calf deaths, 70% came in the first 30 days of life, the median age at death was 14 days, and bears were the leading cause. The study measured survival and causes of death and did not map calving sites or cover, so it cannot tell you which slopes or timber cow elk pick for calving.
How to scout with this study
Use calf-survival research to understand cow elk country, not to overfit one exact feature. Cow-calf groups often need a blend of forage, water, moderate terrain, and security. That blend can create reliable summer and early fall use areas.
Mark gentle benches, meadow edges, riparian cover, and timbered escape routes near feed. Later in the season, check how pressure, snow, and forage have changed before assuming cow elk still use those areas.
Sources and scope
The linked paper reports results for its study animals, location and observation period. The scouting suggestions here are RidgeRead’s interpretation, not field validation of the app or a guarantee of the same behavior elsewhere.