Four populations of sandhill cranes are surveyed each year to estimate breeding population size: the Mid-Continent Population (MCP), in the High Plains U.S.; the Rocky Mountain Population (RMP), in the western U.S.; the Lower Colorado River Valley Population (LCRVP), primarily in northeast Nevada, and the Eastern Population (EP) in the Great Lake, Mid-Atlantic and Southeastern states. These populations are monitored through breeding and pre-migration surveys to provide information for harvest management. For the MCP, extensive, spring aerial surveys on major concentration areas that are corrected for observer visibility bias provide annual indices of abundance used to measure population trends. These surveys are conducted in late March, at a time when birds that wintered in Mexico, Arizona, New Mexico, and Texas usually have migrated northward to spring staging areas, but before spring "break-up" conditions allow cranes to move into Canada. A fall pre-migration survey is conducted by 5 states (UT, CO, ID, WY, and MT) for the RMP, to avoid counting cranes from other populations that comingle during the spring breeding period. The LCRVP is surveyed in winter by airplane at four major wintering areas in Arizona and California. The EP is surveyed by volunteers and agency personnel at staging areas in the fall to count cranes migrating from Canada. Survey areas include the Great Lakes (MN, WI, MI, OH, PA and IN), the Mid-Atlantic (KY and TN) and the Southeastern states (GA and FL).

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Documents

StatusandHarvestofSandhillCranes21

The U.S. Fish and Wildlife Service, working with partners, annually assesses the population status and harvest of four populations of Sandhill cranes: the Mid-continent, Rocky Mountain, Lower Colorado River Valley, and Eastern populations. The annual indices to abundance of the Mid-Continent...

StatusandHarvestofSandhillCranes20

The U.S. Fish and Wildlife Service, working with partners, annually assesses the population status and harvest of four populations of Sandhill cranes: the Mid-continent, Rocky Mountain, Lower Colorado River, and Eastern populations. The annual indices to abundance of the Mid-Continent Population...

StatusandHarvestofSandhillCranes19

The U.S. Fish and Wildlife Service, working with partners, annually assesses the population status and harvest of four populations of Sandhill cranes: the Mid-continent, Rocky Mountain, Lower Colorado River, and Eastern populations. The annual indices to abundance of the Mid-Continent Population...

StatusandHarvestofSandhillCranes18

The annual indices to abundance of the Mid-Continent Population (MCP) of sandhill cranes had been relatively stable from 1982 to the mid-2000s. Some of the annual indices have increased in recent years, and are more variable interannually compared to historic values. The spring 2018 estimate of...

StatusandHarvestofSandhillCranes17

The annual indices to abundance of the Mid-Continent Population (MCP) of sandhill cranes has been relatively stable since 1982, but indices have increased in recent years and show more interannual variability compared to historic values. The spring 2017 estimate of abundance for sandhill cranes...

Species

Programs

The Migratory Bird Program works with partners to protect, restore and conserve bird populations and their habitats for the benefit of future generations by: ensuring long-term ecological sustainability of all migratory bird populations, increasing socioeconomic benefits derived from birds,...
The U.S. Fish and Wildlife Service’s Branch of Aviation Management is responsible for the safety and oversight of the U.S. Fish and Wildlife Service’s fleet of planes and pilots.