Fewer winter hens drove Iowa's 17 percent pheasant drop

STEP 1 · Route Index

An index of 23 birds still comes with a 100,000-rooster band

In early August the Iowa Department of Natural Resources runs about 225 routes. Each route covers 30 miles. Statewide, 22.6 birds per route is what the 2026 report measured on routes that were comparable to 2025. The comparable 2025 figure was 27.4 birds per route. The 17% drop was significant. The index still stood 12% above the 10-year trend.

A weather model had expected no movement from 2025 and the count came in lower. Iowa rounds that index to 23 birds for every route. Hunters are told to expect roughly 350,000 to 450,000 roosters in the fall. The report puts last fall at approximately half a million Iowa roosters. Our rule treats the 100,000-bird statewide band as the precision this survey can support. A route mean is a weak stand forecast and a state harvest is a weak guess for one bag.

The 2026 Iowa report cites Wooley and colleagues from a 1978 analysis where brood totals tracked fall harvest more tightly than every pheasant along the route. The same report credits Janke and colleagues with detection that is usually steady yet still shifts across years and across regions. Iowa adjusts the 2026 brood totals for that shift. Birds per route remains the figure behind the harvest band.

The nine regions moved on separate paths. The northwest came in at 46 birds per route. North-central routes came in at 29 birds per route. The northeast moved from 34 birds per route down to 19. Snow there was the heaviest of any region. Five of the nine regions were still at 20 birds per route or higher. Sort cover inside the stronger regions.

STEP 2 · Shoulder Dew

Medium dew cut the morning count by about a third

The Iowa report describes Klonglan's 1950s work as medium-dew mornings running about a third below heavy-dew mornings. Heavy dew opened 187 routes in 2026. Those 187 routes equaled 88% and matched the 2025 heavy-dew share. Sun at the start fell to 62% of routes from 87% in 2025. The annual swing is both real birds and birds visible from the shoulder.

Our field test is a single gravel mile driven at dawn on heavy dew with light wind. Tally roosters and hens and broods separately. Repeat the mile later that week under dry or cloudy skies. A sharp drop on the second pass is visibility so retain the heavy-dew tally. Next August compare that mile with itself and rank it only against the state regional average.

STEP 3 · Hen Loss

Matching brood size with fewer hens points to winter

Iowa prints the weather pattern its model uses. Counts rise when winter snow stays under 19 inches and the spring is warm and dry with rain under 6 inches. Counts fall when winter snow is 30 inches or more. They also fall when a cold wet spring brings 8 inches of rain or more. Counts hold near steady when snow lands between 20 and 30 inches and spring rain stays between 6 and 8 inches.

Snow in winter 2025-26 averaged 25.6 inches statewide against a normal of 25 inches. April and May brought 8.3 inches of rain against a normal of 7 inches. The mean was 57 F against a normal of 55 F. The warm spring is why the model expected a flat year. Hens on routes were down by a significant amount from 2025 and total chicks were down too. Chicks per brood held with last year. So did chicks per adult hen. The report takes that as fewer hens coming through winter while nesting and brood rearing stayed about as good statewide as 2025. Past telemetry in the report puts normal-winter hen survival around 60 to 65% and mild-winter survival above 90%. Only the southwest added hens and snow there was about 10 inches.

Smaller broods mean hatch trouble or chick losses. Similar brood size with a thinner hen count means winter took the breeders. The 2026 statewide ratios point to winter. Heavy rain at nesting still hit southern and eastern regions. One statewide line leaves counties out.

Kauth's thesis logged 321 female pheasants captured in South Dakota's southwestern Beadle County over 2017 through 2019 and recorded 110 deaths. Winter hen survival there is given as 0.66. Survival ran inverse to snow depth. Using harvested fields raised raptor-predation risk 421%. Using emergent wetlands lowered weather-mortality risk 58%. The 20-year mean snow depth was 2.8 inches (7.0 cm). Our read ranks cattail sloughs plus the other winter cover ahead of last October's roosters.

STEP 4 · Hatch Weeks

Week one and week two after hatch hit broods in one thesis

The Harsh thesis reports 26 broods in the same Beadle County landscape during 2018 and 2019. The thesis reports survival to 31 days at 22 percent for those broods. Heat and rain in week one and week two after hatch had the strongest negative effect. That direction agrees with Iowa's warning on wet springs. Chicks per hen can look ordinary statewide while one wet district loses broods. Read each region's notes.

STEP 5 · Grass Clock

CRP shifts over years and one winter moves one fall

The Iowa report lists Conservation Reserve Program acres of 2,199,360 for 1995 and 1,670,377 for 2025. Hay and small grains also fell over that span. May 2026 enrollment was 1.62 million acres with 727,000 acres expiring by fall 2027. That expiring block is 44% of Iowa's enrollment. The department writes this. "Iowa will cease to be a major pheasant hunting state if the CRP is significantly diminished." That judgment comes from the department's own habitat trend.

Kauth's thesis puts the Beadle County study area at 53% agriculture and 30% pasture and 9% herbaceous grassland that includes CRP. Its abundance model found more pheasants where the nearby landscape held more CRP grassland and more dormant wetlands and row crop around 30 to 40% inside 1.6 square kilometers. That window covers about 0.62 square mile. More grass of that mix went with more birds there during those years. Snow depth still lowered winter survival on the same ground. CRP acres shift over many years. One winter can move a single fall and so can a brood's first two weeks.

STEP 6 · No Brood Survey

South Dakota ended the August routes in 2020

South Dakota GFP once ran 110 brood routes. Every route covered 30 miles between 25 July and 15 August. Crews wanted heavy dew with wind at 8 mph or under and a clear sky. Pheasants per mile functioned as relative density only. Comparisons held only across years inside one local area. Staff judged hunter success with that index plus crop-harvest timing and prior hunting pressure. The brood survey ended in 2020 so staff could shift onto habitat and access. The winter sex-ratio survey ended the same year.

Statewide pheasants per mile in the plan bottomed at 1.03 during 1976 and peaked at 11.38 during 1961. The 2010 to 2019 mean stood at 3.14 pheasants per mile with 5.92 chicks per brood. A season total now comes from a harvest survey of 15,000 resident license holders and 15,000 nonresident license holders.

The 2025 harvest report shows response of 25% from residents and 31% from nonresidents. Projected harvest was 1,351,081 pheasants by 57,076 resident hunters and 82,574 nonresident hunters. Residents averaged 10.21 birds on the season and nonresidents averaged 9.30 birds. Preserve birds fall outside that total.

Our South Dakota rule holds that a 2026 account drawn from last year's bag describes both the hunters and those birds they found. It supplies a stale substitute for the August brood count. Ask how winter snow treated the hens. Ask what week one and week two after hatch did to the chicks. Then ask whether enrolled grass is still there.

STEP 7 · Walk-In Window

A strong count still needs a tract you can enter

Iowa's report says the Habitat and Access Program is mostly private CRP and holds over 30,000 acres. Our walk-in guide on 29 September 2026 measured 156 tracts in the mapped private layer. Median tract size was 142.5 acres. The nearest state-mapped lot sat a median 3.0 miles away. A strong count and a closed CRP field are separate problems. Read the tract rules and where you can park before you drive.

The Kansas walk-in paper for 2026-27 puts the layer at 952,641 acres over 3,554 tracts with 22.3% of the acreage opening on 1 November. Our read picks the region off an August count in any state that still runs the survey and then picks a tract whose dates cover the days you will be hunting.

Dates and limits change from year to year. Check your state agency's current page before you leave.