I'm looking to buy a tripod and found this one. Does anyone know if this is suitable for a beginner who wants to take BIF and landscape photos?
Vanguard Alta Pro 264AB 4-Section Aluminum Tripod with SBH-100 Ball Head
Okay, it's difficult to answer you. It's not b/c that's a bad tripod. It's that what's a good tripod depends on the shooter.
You said landscapes and birds in flight. Well, if you have to hike a distance to get there than you want a tripod that is light and will attach to a backpack easily. If you're doing long exposures then you want a tripod that is rock solid (and that either means carbon composite build or a heavy sucker). If you're going to be looking through your viewfinder a lot (waiting for a bird to take flight before you snap...meaning...timing is everything) than you want a tripod that telescopes to your height (that's an issue b/c often times for stability, I won't raise my center column on my manfrottos). And the point others have mentioned about weight--I suspect you either are or in the future will be shooting with a 400mm bazooka. You will want a tripod that can handle that weight and maybe allow provisions for spikes (in to the ground) OR sand-bags (to stabilize) so while your camera is on your tripod for 2 hours as you sit for the eaglets to do something interesting, a stiff wind doesn't catch your top heavy tripod and blow it over.
It is impossible to find a tripod that is great at everything. I have one that fits in to carry-on luggage (but I sacrifice stability and height). I have another that is rock-solid stable with a tillable center column (ideal for food, macro, and product photography). But I would never want to go hiking with it. I have a small gorillapod that attaches to my holster--great for street photography and moving around the city. I have clamps I can use indoors when some places ban tripods ("gee officer, it's not a tripod, I've just clamped my camera to my chair"). Be clear about what you want it to do best and then choose accordingly.