Tuleyome's Science Corner - Sandhill Cranes

Kristie Ehrhardt • November 9, 2023

Sandhill Crane by Bob Zeller, National Wildlife Federation

When is the last time you saw a real-live dinosaur? I’m guessing it’s been a while, am I right? If you’d like to get an up close and personal look at a living fossil, look no farther than the wetlands and surrounding habitat types of California’s Central Valley. Sandhill Cranes (Antigone canadensis) are among the oldest living bird species on Earth. Beginning in October, their arrival from their northern breeding grounds creates quite a spectacle as thousands upon thousands of these giant birds arrive in the Central Valley to spend the winter. Their homecoming is announced by their unique and thunderous bugling calls. 


There are 15 species of cranes world-wide with only two species occurring in the United States; Sandhill Cranes and Whooping Cranes. There are three migrating subpopulations of Sandhill Cranes: Lesser, Greater and Canadian, and three non-migratory subpopulations: Mississippi, Florida and Cuban, each occurring in their namesake locations. Both the Mississippi and Cuban subpopulations are critically endangered. Of the three migrating subpopulations, it is the Greater subpopulation that winters here in our region. During the cranes’ migration back to their breeding grounds in the spring, tens of thousands of them congregate along the Platte River in Nebraska. It is there that a fossil from a Sandhill Crane relative estimated to be approximately ten million (!) years old was found.


This living fossil belongs to the taxonomic order Gruiformes which dates back to shortly after the end of the dinosaurs, about 60 million years ago. The oldest conclusive Sandhill Crane fossil dates back about two and a half million years while most modern-day birds’ lineage dates back to less than two million years ago, proving Sandhill Cranes to be much older than most bird species.


Sandhill Cranes are large bulky birds with wingspans from five to seven feet. They stand about five feet tall and can weigh up to twelve pounds. Adults boast mainly slate gray plumage that may be streaked with mud, long necks with pale cheeks, an unmistakable bright crimson cap and their illustrious “bustle” of longer feathers covering their rears. Juveniles have the same gray plumage minus the red cap with the addition of a rusty wash on their on their wings, neck, back and tops of their heads. They are impressive fliers and take advantage of thermals and currents, staying aloft for hours without exerting unnecessary energy. They generally cover up to 300 miles in a single day but some have gone as far as 500 miles with a helpful tailwind. They fly with their necks outstretched and their feet and legs trailing behind them filling the skies with their shape and trumpeting sounds. 


Sandhill Cranes are social and live in pairs or with their family groups, but when it is time to make the journey to their wintering grounds, large groups of unrelated cranes come together to migrate, forage and roost as one extensive unit. They mate for life and use their calls along with their elaborate and graceful dance moves to court and secure their life partners. Once bonded, the pairs build grand, mounded nests made of sedges, reeds and grasses in wetlands or the surrounding uplands. One to three eggs are laid and will hatch about a month later. As is common with ground-nesting birds, the hatchlings begin wandering from the nest after only a few hours. The young begin to fly at about three months of age, but remain with the parents during migration and for the remainder of the year until the next clutch is laid the following season. They are omnivores and their diet changes with their locations and the seasons. While in California they forage for seeds, plants, worms, snails, reptiles, amphibians, and small mammals in open grasslands, fields and wetlands. Sandhill Cranes are famous for their rolling, reverberating calls which are a result of their anatomy. Their trachea is very long and coils into their breast bone which lowers the pitch and amplifies the sound of their call which can be heard for long distances.


They’re only here for a short time and if you’d like to see how special they are just visit the Woodbridge Ecological Reserve and/or the Cosumnes River Preserve from October through February. Cosumnes River Preserve offers guided Sandhill Crane tours. Note, you will need a Lands Pass, or a hunting or fishing license to enter the Woodbridge Ecological Reserve. And, although they’re enormous, you’ll kick yourself if you forget your binoculars!


-Kristie Ehrhardt (kehrhardt@tuleyome.org)


Tuleyome Land Conservation Program Manager

RECENT ARTICLES

By Bryan Pride November 5, 2025
Tuleyome welcomes our first Policy Intern, Diego Barraza. Diego is a Senior at UC Davis studying Environmental Science and Management and is from Santa Barbara, California. Diego will be joining Tuleyome for a 10 week internship to assist with Tuleyome’s policy initiatives, including supporting the work of the Berryessa Snow Mountain National Monument and Molok Luyuk working group coalition and the San Pablo Bay National Wildlife Refuge Expansion Act. We are excited to have Diego join our team and support our policy initiatives!
By Nate Lillge November 5, 2025
The Berryessa Snow Mountain National Monument region has many wonderful trails to explore and enjoy. From urban parks, like American River Bend Park, to trails that help you get away and above it all, like the Berryessa Peak Trail. Do you want to explore on your mountain bike? Head to Fiske Creek and Blue Ridge Trails. Looking for a place to take your horse? The appropriately named Cowboy Camp is the place to go! Ever hiked a volcano? Check out Mount Konocti. Tuleyome’s Trail Guide has guides to nearly 40 trails in the Berryessa Snow Mountain National Monument region and western Sacramento Valley. This is not an exhaustive list but instead provides you with some of our favorite and most popular locations to experience this wonderful and unique location.
By Kristie Ehrhardt November 5, 2025
If you’re a friend of Tuleyome you likely know a bit about our (it belongs to all of us) newly expanded favorite National Monument - the Berryessa Snow Mountain National Monument. You may also recognize that federal public lands are lands that are owned and/or managed by the United States federal government for the enjoyment of its citizens. And, you probably know that in addition to national monuments there are also national parks, national forests and national historic places but did you know that there are many more public land designations as well?! There are many (MANY!) different types of federal public lands. Most of them are held for conservation, resource management and public recreation. The United States Department of the Interior (DOI) oversees several federal agencies that manage various public land designations and the United States Department of Agriculture (USDA) oversees other agencies that steward public lands. Federal public lands in the United States, District of Columbia and US territories total approximately 640 million acres and occupy nearly 30% of the land area. The National Park Service is an agency within the DOI and oversees not only national parks but also most national monuments and other natural, historical and recreational properties with various title designations or units. These include national preserves, national lakeshores and seashores, national rivers and wild and scenic rivers and national scenic and historic trails, among others. Today The National Park Service currently manages 433 combined parks/units including 63 national parks, 87 national monuments, 75 national historic sites, 64 national historic sites and many other designations totaling 85 million acres in all 50 states, the District of Columbia and US territories. Their management focus is preserving the ecological and historical integrity of these special places for public use and enjoyment. The Bureau of Land Management (BLM) is a federal agency also under the direction of the DOI. The BLM’s mission is “to sustain the health, diversity and productivity of public lands for the use and enjoyment of present and future generations.” We here at Tuleyome think that’s pretty dang good and we often partner with them on varying components of public land use and enjoyment. The BLM is responsible for the management of a substantial portion of the nation’s public lands including some of our most historic and scenic landscapes and natural resources for all to enjoy. The United States Fish and Wildlife Service (USFWS) is another agency operated under the DOI and is the oldest conservation agency in the United States. It was established in 1871 to help monitor the country’s game fish populations. Today the USFWS manages our nation’s wildlife refuges to conserve the habitat, plants and wildlife found there. The national wildlife refuge system began with Pelican Island in 1903 and today there are over 560 refuges across the country. It’s been said that if “national parks are America’s best idea, national wildlife refuges are America’s best-kept secret”. Although, they don’t seem like a very stealthy secret since they receive over 50 million visitors a year! The United States Forest Service (USFS) was established in 1905 and is an agency under the USDA. It is the United States’ predominant forestry agency leading the world in sustainable forest and grassland use, management and stewardship, research and conservation. Today they are responsible for the management of 154 national forests and surrounding areas that total nearly 200 million acres in 43 states, the Virgin Islands and Puerto Rico. The agency also provides stewardship assistance to tribal, state and local governments, private landowners and corporations to improve conditions on about 900 million acres of forests in the U.S. Fun fact - Yellowstone was the United States’ first national park established in 1872. But, at the time Wyoming was still a U.S. territory so Yellowstone was managed by the federal government using the Army and the African American Buffalo Soldiers. Fun fact - the designation National Monument has been given to many different sites ranging from natural reserves, historic military scenes, prehistoric ruins, fossil sites AND to the Statue of Liberty. Fun fact - there is at least one national wildlife refuge in every US state and territory. Fun fact - The Forest Service obviously manages forests but did you know that they also manage grasslands? Did you know… that the Berryessa Snow Mountain National Monument is jointly managed by both the BLM and the USFS, not the National Park Service!? Whether you’re exploring places where you won’t find a motorized vehicle or places where you might not find a parking spot, you can bet there is at least one type of federal public land just a hop, skip and a jump from you! The numerous designations within the National Park System sometimes confuse visitors. The names are created in the Congressional legislation authorizing the sites or by the president, who proclaims "national monuments" under the Antiquities Act of 1906. Many names are descriptive—lakeshores, seashores, battlefields—but others cannot be neatly categorized because of the diversity of resources within them. In 1970, Congress elaborated on the 1916 National Park Service Organic Act, saying all units of the system have equal legal standing in a national system. National Park These are generally large natural places having a wide variety of attributes, at times including significant historic assets. Hunting, mining and consumptive activities are not authorized. National Monument The Antiquities Act of 1906 authorized the President to declare by public proclamation landmarks, structures, and other objects of historic or scientific interest situated on lands owned or controlled by the government to be national monuments. National Preserve National preserves are areas having characteristics associated with national parks, but in which Congress has permitted continued public hunting, trapping, oil/gas exploration and extraction. Many existing national preserves, without sport hunting, would qualify for national park designation. National Historic Site Usually, a national historic site contains a single historical feature that was directly associated with its subject. Derived from the Historic Sites Act of 1935, a number of historic sites were established by secretaries of the Interior, but most have been authorized by acts of Congress. National Historical Park This designation generally applies to historic parks that extend beyond single properties or buildings. National Memorial A national memorial is commemorative of a historic person or episode; it need not occupy a site historically connected with its subject. National Battlefield This general title includes national battlefield, national battlefield park, national battlefield site, and national military park. In 1958, an NPS committee recommended national battlefield as the single title for all such park lands. National Cemetery There are presently 14 national cemeteries in the National Park System, all of which are administered in conjunction with an associated unit and are not accounted for separately. National Recreation Area Twelve NRAs in the system are centered on large reservoirs and emphasize water-based recreation. Five other NRAs are located near major population centers. Such urban parks combine scarce open spaces with the preservation of significant historic resources and important natural areas in location that can provide outdoor recreation for large numbers of people. National Seashore Ten national seashores have been established on the Atlantic, Gulf and Pacific coasts; some are developed and some relatively primitive. Hunting is allowed at many of these sites. National Lakeshore National lakeshores, all on the Great Lakes, closely parallel the seashores in character and use. National River There are several variations to this category: national river and recreation area, national scenic river, wild river, etc. The first was authorized in 1964 and others were established following passage of the Wild and Scenic Rivers Act of 1968. National Parkway The title parkway refers to a roadway and the parkland paralleling the roadway. All were intended for scenic motoring along a protected corridor and often connect cultural sites. National Trail National scenic trails and national historic trails are the titles given to these linear parklands (over 3,600 miles) authorized under the National Trails System Act of 1968. Affiliated Areas In an Act of August 18, 1970, the National Park System was defined in law as, "any area of land and water now or hereafter administered by the Secretary of the Interior through the National Park Service for park, monument, historic, parkway, recreational or other purposes." The Affiliated Areas comprise a variety of locations in the United States and Canada that preserve significant properties outside the National Park System. Some of these have been recognized by Acts of Congress, others have been designated national historic sites by the Secretary of the Interior under authority of the Historic Sites Act of 1935. All draw on technical or financial aid from the National Park Service. Other Designations Some units of the National Park System bear unique titles or combinations of titles, like the White House and Prince William Forest Park . Types of federal public lands National Parks : Managed by the National Park Service (NPS), these lands are preserved for their natural and cultural resources for future generations to enjoy. National Forests and Grasslands : Managed by the U.S. Forest Service (USFS), these areas are used for multiple purposes, including timber, recreation, and wildlife management. National Wildlife Refuges : Managed by the U.S. Fish and Wildlife Service (USFWS), these lands are primarily for the conservation of fish, wildlife, and plants, but many also allow compatible wildlife-dependent recreation like hunting and fishing. National Conservation Lands : These are public lands designated for their conservation value and are managed by the Bureau of Land Management (BLM). The BLM manages more public land acreage than any other agency. Management and use Management: Federal lands are managed by various agencies, with the U.S. Forest Service (Department of Agriculture) and the Bureau of Land Management, the National Park Service, and the U.S. Fish and Wildlife Service (all under the Department of the Interior) being the primary ones. Resource Extraction: Some federal lands are available for resource extraction like oil, gas, and mining, which can be a source of controversy and debate over conservation versus extraction. Recreation: The lands offer a wide range of recreational opportunities, such as hiking, camping, wildlife viewing, hunting, and fishing. Information: You can find information about specific public lands, including maps and regulations, on the official websites of the managing agencies.