2008年9月16日星期二

Bird Feeder Believed To Attract More Than Birds

Just as the name implies, a bird feeder is a device that is placed outdoors for the purpose of dispensing food to birds. The ultimate success of a bird feeder is determined by it’s placement, the types of seeds provided and the design of the feeder itself.

To begin with, a bird feeder must be large enough to accommodate the nearby species. Birds need to be able to get to the seeds easily if they are to continue to use the bird feeder. In addition, the feeder should be placed somewhere convenient and easily accessible. Most bird feeders are located in a tree that birds are known to frequent.

The type of bird that you wish to attract will ultimately determine the type of food that you supply in the bird feeder. For example, while most food is made in the form of seeds, hummingbirds prefer liquid nourishment. This is a very important distinction as bird feeders are created for birdwatching and, without the proper food, there may not be any birds to watch.

Many people around the world enjoy birdwatching and some even record their experiences on video. Some individuals use webcams, while others use a regular camcorder to capture their birds on film. Don’t be surprised, however, if you happen to capture a squirrel on video. These little creatures are famous for helping themselves to the contents of a bird feeder and not even so much to eat the food, but rather to carry it away and store it elsewhere. There are, however, a number of bird feeder manufacturers that create their products with the hope of deterring squirrels from swiping all of the seeds. This may include a collapsible bird feeder if anything heavier than a bird should begin to feed or one that provides a slight shock or spins to throw the squirrel a short distance away.

A bird feeder is easy to find at any retail or online store, but the many choices available may make the decision a difficult one. Ultimately, the size of the feeder and it’s design will be the most important consideration.

Often, the most effective way of keeping a squirrel away from a bird feeder is to set out a squirrel feeder. Corn and berries are among the foods that may interest a squirrel and may keep him/her occupied so as to not disturb the bird feeder. These creatures, themselves, can add quite a lot of amusement and birds may find themselves sharing the spotlight as many birdwatchers turn toward watching squirrels, as well.

2008年9月4日星期四

Turtles Swallows


Sea turtles are large, air-breathing reptiles that inhabit tropical and subtropical seas throughout the world. Their shells consist of an upper part (carapace) and a lower section (plastron). Hard scales (or scutes) cover all but the leatherback, and the number and arrangement of these scutes can be used to determine the species.


turtles

turtles are reptiles of the Order Testudines , most of whose body is shielded by a special bony or cartilaginous shell developed from their ribs. The Order Testudines includes both extant (living) and extinct species. The earliest known turtles date from 215 million years ago, making turtles one of the oldest reptile groups and a more ancient group than lizards and snakes. About 300 species are alive today, and some are highly endangered.

Sea turtles come in many different sizes, shapes and colors. The olive ridley is usually less than 100 pounds, while the leatherback typically ranges from 650 to 1,300 pounds! The upper shell, or carapace, of each sea turtle species ranges in length, color, shape and arrangement of scales.

Sea turtles do not have teeth, but their jaws have modified “beaks” suited to their particular diet. They do not have visible ears but have eardrums covered by skin. They hear best at low frequencies, and their sense of smell is excellent. Their vision underwater is good, but they are nearsighted out of water. Their streamlined bodies and large flippers make them remarkably adapted to life at sea. However, sea turtles maintain close ties to land.

turtles cannot breathe in water, but they can hold their breath for various periods of time.

Females must come ashore to lay their eggs in the sand; therefore, all sea turtles begin their lives as tiny hatchlings on land. Research on marine turtles has uncovered many facts about these ancient creatures. Most of this research has been focused on nesting females and hatchlings emerging from the nest, largely because they are the easiest to find and study.

Thousands of sea turtles around the world have been tagged to help collect information about their growth rates, reproductive cycles and migration routes.

Like other reptiles, turtles are poikilothermic . Like other amniotes, they breathe air and do not lay eggs underwater, although many species live in or around water. The largest turtles are aquatic.After decades of studying sea turtles, much has been learned. However, many mysteries still remain.

for:http://www.turtles-house.com