Are there various types of bird perches available for my bird cage?

As long as you provide a variety of perches in your bird's cage, the choice of which to use for sleeping is up to your bird. Your bird most likely knows, instinctively, where they want to sleep. The only type of perch I would recommend not allowing your bird to sleep on is a sandpaper perch. My personal favorite perch style for sleeping is a Booda perch.

This is a type of perch for your bird cage that allows for some self-grooming. It is a great way to trim down your bird's nails. They often come in great space-saving styles such as corner perches and half sizes. Look into concrete-blended perches. In my opinion they are the best type of grooming perches. Here are a few examples -

http://www.perchfactory.com/bird_cage_perches/sandy_cement_perches.htm

http://www.avianenrichment.com/store/pc/Grooming-Perches-c133.htm

You should have a minimum of 3 perches - one for sleeping, and two others made of different materials and of varying sizes. This will give your bird enough variety without overcrowding the cage.

You should stagger the perches throughout the cage in different areas and at varying heights. This will increase the amount of exercise your bird gets. Do not install perches directly over your birds food and water bowl. Waste will drop and contaminate the food.

Cage size is a very crucial element in regards to proper bird care. The tail of your bird should never touch the back or bottom of the cage when sitting on their perch. A very general rule to follow is that the width of the cage should be at least 1-1/2 times as wide as your bird's wingspan. Keep in mind that it is not just your bird(s) inhabiting the cage but you will need a perch and most likely some toys. My personal recommendation is to buy the largest cage you can afford.

I suggest you to have a look at http://www.birdcages.com/helpfulinfo.cfm. I personally purchased a parrot perches from their site and I was very pleased with their customer service and their products. If you're looking for a bird cage you'll find it there.

Parrot perches are usually made for large sized birds. If you own a couple of small birds you don't really need this cage bur if you own more than 3 parrot you should consider a parrot perches to provide your birds the space they need.

It depends on the bird type and size. If it is a big parrot like African greys or macaws I would put 2-3 ladders. I also recommend having ladders and perches in the birds stand so the bird will be able to stretch their wings and do some exercise.

You need to make sure that none of the perches,toys and cage parts contain Lead, Zinc or Galvanized parts. All these materialscan lead to serious health issues.