From the Lander region:
Pronghorn classification surveys are conducted just before the hunting season begins, in August and September each year. These are done by field personnel driving designated routes across each hunt area and all pronghorn groups are carefully observed to tally the number of does, fawns, yearling bucks, and adult bucks Then data from all hunt areas within a herd unit are combined to determine the age and sex composition of the herd. So, for the Beaver Rim pronghorn herd unit, there are seven hunt areas that have been tracked together since 1994 (Hunt Areas 65, 66, 67, 68, 69, 74, and 106).
Last fall, Game and Fish staff observed a 40% decline in the number of pronghorn along the same routes driven in 2019 (and for many years before that). Even though that is a pretty dramatic change, there are factors that can affect the number of animals seen. A bigger concern is that the ratio of fawns per 100 does was the lowest observed in 25 years. There was almost no rain across much of the Lander Region in 2020, with only 6/10ths of an inch of rain from Easter until Labor Day at the Lander Airport (about 88% below average). Combining such dry conditions after a pretty hard winter in 2019-20, pronghorn had a rough year. Survival of fawns born in 2019 was also lower than average, with the number of yearling bucks observed in fall 2020 being much lower than average. Several groups of pronghorn were observed in September with ribs and hip bones showing, indicating these animals were having a hard time finding good forage last summer. All this information points to a declining population, so it’s likely there will be very few doe/fawn licenses in the 2021 hunting season and fewer Type 1 licenses which are valid for any antelope, but for which most hunters harvest bucks.
https://wgfd.wyo.gov/Regional-Offices/Lander-Region/Lander-Region-News/How-are-the-big-game-herds-around-Lander
