During the spring and summer months, when the weather's warm and we're outside a lot, it's easy to remember to fill feeders and water containers for backyard birds. But often, even those who conscientiously care for wild birds in warm months will forget that many of them remain in the area during winter and still need our help.
Typically, a bird's food search begins at dawn and continues till dusk, particularly in colder climates. If a bird can get food during the day, it will store enough energy to survive a cold night and then start the search all over again the next day. Sometimes, our assistance with food and water can help make the difference between death and survival for wild birds.
Birds' needs for drinking water, as an example, can become even more critical in the winter months when their natural water sources freeze. Although birds often use snow as a source of water, snow can glaze over with ice and become inaccessible as a water source, particularly in the coldest months. The most critical situations for birds are often when temperatures remain below freezing for prolonged periods, yet there is no snow to provide water.
If you do maintain a birdbath or other water source for birds, ensure that it is clear of debris and routinely checked for ice cover. Electric warmers are an ideal way to keep bath and small-pond water from freezing. They cost from about $20-$40 for a small, non-thermostatic de-icer to about $50 to $85 for a high-watt, thermostatically controlled unit.
In the winter, a ground-level bath can be more effective than a conventional raised, pedestal-style bath since it has less area exposed for heat loss. Also, locate a bath or pond on the south side of a natural windbreak - such as a house, fence or shrubbery - to maximize the solar heat to the bath. Use a dark-colored bath or pond liner to maximize solar energy absorption.
When possible, use a bath or pond with moving water. This will attract both birds that come to feeders and birds that typically do not. If you've previously used only a still-water bath, you will likely have new birds visiting your yard. Some experts say that as many as 3-4 times as many birds can be attracted by simply providing moving water. Moving water gets the birds' attention, is healthier than stagnant water and helps alleviate the freezing problems encountered by unheated still-water baths and ponds.
A simpler approach to the moving water scenario is a dripper installed in the bath or pond. Usually, they are connected to an outdoor faucet and set at a regulated drip to keep the birdbath filled with fresh water. An added bonus is that the ripples created by the dripper help attract birds. When set at a drip rate of once per second, they use about one pint of water per hour. In areas where water conservation is critical, timers can be connected to automatically control flow.
Wild backyard birds often depend on every seed, berry or insect they may find. But as humans build and clear land, we destroy their natural habitats Ð and food sources.
Commercially prepared seeds are fine for wild birds as long as they and the feeders do not get moldy. Studies have shown that black-oil sunflower seeds attract the greatest number of species. If you feed bread and other bakery products to your backyard birds, be aware that you might also be attracting nocturnal visitors such as raccoons. Suet is a good high-energy food that gives birds an additional boost to survive the cold.
Cat predation can be a major problem for wild birds that would otherwise come to a backyard feeder, bath or pond. For hanging feeders, make sure they are at least four feet off the ground. Cats and other bird predators hunt by surprise, so keep feeders and baths away from bushes and other predator hiding places.
Tom Gillespie lives in Trinity and is a journalist and public affairs specialist at the North Carolina Zoo. For more information on the zoo's plant and animal collections, special events and education programs, go to their Web site at www.nczoo.org
Tom Gillespie
Zoo Tales - Remember wild birds in winter
- Tom Gillespie
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Zoo Tales: Aviary a respite from winter's grasp
January and February are seldom thought of as a time for leisurely strolls along trails and stops to smell flowers blooming or to watch colorful birds. But at the N.C. Zoo's R.J. Reynolds Forest Aviary exhibit, that's what's in store for zoo-goers.
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Zoo Tales: Sitatunga an odd antelope
Mention the words African antelopes and, most likely, images of animals roaming vast, arid drylands would appear. But visitors to the North Carolina Zoo are often surprised to learn that one of the park's antelope species, the sitatunga, is classified as semi-aquatic.
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Zoo Tales: Helping hands
Over the years, the mission of the North Carolina Zoo – to encourage understanding of and commitment to the conservation of the world’s wildlife and wild places – has often meant going beyond the park’s walls.
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Zoo Tales: ‘Good Samaritans’ can unknowingly harm animals
Sometimes, no matter how well-meaning the actions of a “Good Samaritan” are, young, injured and disoriented animals can be harmed simply because the person trying to help the animal does not know the facts and proper procedures.
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Zoo Tales: Aging animals a concern
Although zoos have always faced the problems of aging animals, today it has become an evolving part of their animal husbandry – learning how to care for older animals and to meet their needs
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Zoo Tales: Bats often misunderstood mammals
Bats. It’s likely that only snakes are more feared and more misunderstood than these nocturnal mammals.
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Zoo Tales: Gorillas are treat for Zoo visitors
Though often erroneously called monkeys, gorillas are actually great apes. Gorillas are skilled climbers but spend most of their time on the ground.
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Zoo Tales: Fringe-eared oryx is zoo’s newest antelope
With a nickname like "spear antelope," one could rightly assume that the oryx, one of the N.C. Zoo's newest animal species, would have slender, elongated horns. But then throw in their subfamily name, Hippotraginae (which literally means "horse-goats"), and one might be left guessing.
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Zoo Tales: Ocelots a puzzle to many
Often, visitors to the N.C. Zoo who see ocelots for the first time aren't sure what they are exactly. Larger than a domestic cat but smaller than a leopard or jaguar, the ocelot is a wild cat ranging from South and Central America, through Mexico and into the extreme southern parts of Texas, with rare sightings in Southern Arizona.
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Zoo Tales: Animals beat heat in varying ways
At the N.C. Zoo and at many other zoos and animal facilities, keepers help the animals through a variety of cooling techniques from putting ice into the exhibits for the animals to wallow in to air-conditioned holding areas to ponds within the exhibits.
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