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Waterfowl Articles

Understanding Geese

by T.R. Michels


Shortly after I began guiding goose hunts in 1987 I met Dr. Jim Cooper, one of the most highly respected waterfowl researchers in the world. He is an Associate Professor of Wildlife with the Department of Fisheries and Wildlife at the University of Minnesota, and has studied Canada Geese for over twenty-five years. The first time we met I told him I wanted to pick his brain about calling, feeding habits, reaction to weather, habitat, family behavior, flock makeup and migration. After talking to Jim and reading the results of his studies it became apparent to me how important the family behavior of the flock is in understanding geese. Once I began to understand the role of the family in the flock, it changed the way I hunt geese.


Feeding Habits
Geese are primarily grazers, they eat grass and succulent greens when they are available. Even when there is abundant corn I have seen geese eating grass on city parks and golf courses while most of the ground was covered with snow. If you can find a field of green grass it is one of the best places to decoy geese. Small grain like corn, barley and soybeans are used in the fall when grass is gone or lost its chlorophyll. Generally geese fly out to feed twice a day, once shortly after daylight and again before sunset. During the day they often loaf on the water near food sources. In urban areas they use city parks, golf courses, and lakes and ponds with homes around them.

Reaction to Weather; Barometer, Wind, Precipitation, Temperature
Weather affects geese in a number of different ways. Dr. Cooper says that because geese have numerous air sacks in their body they have the ability to detect subtle barometric pressure changes. When fall storms approach geese stop feeding and begin to flock as much as two days before the storm. Heavy precipitation and strong winds may make it difficult for geese to fly. In extreme rain, snow or wind-chill geese may fly out only once late in the morning or not fly at all. If the temperature or wind-chill is below 10 degrees Giant Canadas often remain on the roost. If they fly in this weather they may actually lose more calories than they gain in feeding. They often feed heavily before or during the first few hours of a storm and when the weather lets up. Dr. Cooper's studies show that Giants can go 30 days without feeding and never leave the roost.

Reaction to Visibility; Light, Fog, Snow
Because geese rely on their sight to detect danger they don't like to feed or rest on land in low light conditions. They usually wait to feed until there is sufficient light for them to feel secure. Clouds, rain, snow or fog cause geese to fly out later in the morning than normal because of reduced visibility. New snow or fog disorients geese and they may fail to recognize refuge lines and feeding fields. They are wary of anything that doesn't look right. When going out to feed they often follow other flying flocks and look for fields that have flocks already feeding in them before landing.

Migration
Geese begin to migrate in the fall when cold weather, strong winds and snow signal the onset of winter. They migrate only as far as they have to in order to find open water, available food, and temperature suitable to their body size. Because of their large body size Giant Canadas can withstand colder temperatures than their smaller relatives. They may not fly any farther south than the northern tier of the United States.

Brant (Branta bernicla)
Brant are a small dark goose similar in appearance to Canada Geese. they lack the white cheek patches of the Canada but have a small white throat patch and black breast. They nest farthest north of all North American geese, generally inhabit salt water on both the Atlantic and Pacific coast, and feed almost exclusively on aquatic vegetation when in staging areas and wintering areas. the western subspecies is often called the Black Brant and can be distinguished from the eastern subspecies by the black chest stretching into the belly. The combined population in 1986 was estimated at 291,000 birds.

Ross' Goose (Chen rossii)
Ross' Geese look like a smaller version of the Lesser Snow Goose, and it's bill is stubbier. It is almost impossible for the average hunter to distinguish between the two species.

Canada Goose (Branta canadensis)
Experts disagree on the exact number of subspecies of Canada Geese (Branta canadensis). There may be from 11-17 subspecies ranging in size from the small Richardson's of the west to the Giant found in many cities across the continent. Their size ranges from 3 pounds in the smaller species to 16 in the larger species. There is a record of a 27 pound goose in Manitoba. Overall lengths range from 22-45 inches from bill to tail. Six foot wing spreads may be reached in the largest species. The more common subspecies of Canada geese include the Giant (B.c. maxima), Todd's (B.c. interior), Lesser (B.c. parvipes), Richardson's (B.c. hutchinsii), Western (B.c. moffitti), Atlantic (B.c. canadensis), Dusky (B.c. occidentalis), Vancouver (B.c. fulva), Aleutian (B.c. leucoperea), and Cackling goose (B.c. minima). In 1986 there were an estimated 7,000 Dusky, 23,000 Cackling and 4,000 Aleutian canadas breeding in Alaska. These are the only three populations of Canada geese without significant numbers. The estimate at that time was over two and a half million Canada geese of all subspecies, with about one million of those the once thought to be extinct Giants. The Aleutian canada goose is on the endangered species list.

Giant Canada Goose
Giants are the largest subspecies of Canada Geese and because of their size are able to stay farther north in the winter than their smaller cousins, they may not migrate at all in warm years. They nest farther south than the smaller geese, where there is more abundant forage for their large appetite. Giant's were thought to be extinct until they were rediscovered in Rochester, Minnesota in 1947. They now number over a million birds, comprising over a third of all Canada Goose subspecies in North America.

Giant Canada geese don't nest in inhospitable sub-arctic regions like their smaller relatives, and therefore generally have better nesting success, with clutches of from 2-12 eggs. In urban areas, where many Giants live, all of the young may reach six months of age. Unlike most other geese Giants often mate at two years of age. The smaller species of geese mate at age four and usually have 2-6 eggs per clutch. Earlier mating and higher reproduction rate has led to a population explosion of Giant Canadas in many areas. They have become a nuisance in many urban areas, where they leave droppings and destroy grass on parks, golf courses and lake properties. Because Giants nest farther south and winter farther north than other geese they receive less hunting pressure (as little as 30 days) than geese that migrate from as far north as Canada and the Arctic Circle to the Gulf Coast, which may be subjected to up to 120 days of hunting. Because of their larger body size and habit of living in urban areas Giants are also less susceptible to predation.

Snow Goose (Chen caerulescens)
There are two distinct subspecies of snow Goose; the Greater Snow Goose and the Lesser Snow Goose, of which the blue goose is simply a color phase. The Greater Snow Goose nests near the Arctic Circle and migrates through the New England states along the eastern shore. It has recovered from a few thousand birds to an estimated 250,000 in 1986. The several populations of the Lesser Snow Goose breed from the southern Arctic Circle to lower Hudson Bay. The Lesser Snow Goose is divided into four populations; the Mid-continent, Western Central Flyway, Wrangell Island and Western Canadian Arctic. Both the Greater and Lesser Now Goose are white with black wing tips, except for the blue phase of the Lesser, which is blue gray in color, usually with a white head and neck. The young of both the Greater and Lesser are gray and similar in appearance to the blue phase except they do not have the white head. The blue goose appears to be a dominant color phase, and in many areas is becoming the predominant coloration of the Lesser snow Goose. Like Canada 's, Snow Geese populations have increased dramatically in recent years, and they are destroying habit on their nesting grounds and threatening the environment. More liberal hunting regulations are needed to bring the populations in balance with their environment. The total number of Snow Geese in 1982 was estimated at 2,622,000.

White-fronted Goose (Anser albifrons)
The North American White-fronted Goose is closely related to the Pink Footed Goose and the Bean Goose of Europe and Asia. They are a brown-gray goose with black specks on the belly giving them the common name of "speckle belly." They have a white patch on the front of the head from which their proper name comes. They breed from Alaska to the Greenland and winter from southern British Columbia to Illinois and the Gulf Coast of Texas and Mexico. White-fronted Geese are also divided into four populations; the Eastern mid-continent, Western mid-continent, Tule and Pacific Flyway. Both the Tule and Pacific breed in Alaska and winter in the western United States and Mexico. The estimated combined population in 1986 was 377,000.



About the Author:

T. R. Michels is nationally recognized for his action-packed, informative seminars based on his experience as a wildlife researcher and professional guide.

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Website: www.TRMichels.com