A few more important details worthy of note
Most of the newer cameras can take video (both DSLRs and compacts) - and most current ones can take video clips of almost unlimited lengths (a few years ago most DSLRs were limited to thirty or 45 second clips). Some DSLRs, like the Nikon D90, take very high quality video, but all still lack a lot of the video features you find on a "real video camera" - and don't really replace one for more than occasional use.
Shooting speed is really a combination of several things.
Startup time is how long it takes the camera to "warm up" when you turn it on. Most DSLRs are well under a second for this (some under 0.1 second), but most compacts are slow, often up to several seconds. Some compacts, notably some Nikons, however, are much better than others - read the specs.
AutoFocus time is how long it takes for the lens to focus when you don't do it manually. (You have the choice of using auto, pushing the button halfway ahead of time, or doing it manually.) Different cameras, and even different lenses on DSLRs, are faster or slower. Some also take a lot longer to focus in dim light, or don't do it reliably at all. Manual focus is the fastest, since you don't have to wait for the camera to do it, and it always does what you want (which the camera sometimes does not), but it is more work and one more thing to think about.
Repeat-rate or burst-rate is how fast the camera can take multiple shots. There's a limit to how many shots you can take in a row and the time between them. For something like moving birds, you might want to hold the button down and shoot a whole series of shots, then pick out the good ones later (it's nice when you don't have to buy the film). DSLRs tend to be much better at this. A mid-speed DSLR can usually take three pictures a second or so, while most compacts are well below one a second. You can get much higher speeds than that, but you pay a lot for that (and you can usually take more pix in a row with JPGs).
Anti shake is cool, but it is limited. It is designed to compensate for your hand being unsteady, and so doesn't help when the target moves. Some cameras also do it better than others. Incidentally, with some DSLRs, the anti-shake is in the camera, so all lenses become anti-shake when you plug them in. With others, like Nikons, it's in the LENS instead. Both options have their pros and cons.
Some cameras use custom rechargeable batteries, while others use plain old penlite AA cells (which can also be rechargeables), but that isn't the whole story. Battery life for cameras varies wildly. Some cameras average less than 100 shots out of a set of batteries, while others can get up to a thousand shots from a single set or charge. DSLRs tend to the higher numbers. Needing a hard-to-find custom battery isn't that much of an issue when one charge lasts for
days of shooting. (You should, of course, buy and carry one spare battery anyway.) Another advantage of a single "battery module" is convenience; you entirely avoid the "which batteries go with which sets of rechargeables" game and needing little baggies or boxes to keep the sets together. Obviously, using the internal flash uses up batteries more quickly for both types of camera, so batteries last longer for outdoor shooting .
Low light and picture noise:
The smaller sensors and lenses in compacts tend to lead to noise problems relative to DSLRs. This tends to be noticeable mostly with low light non-flash shots. You don't "hit the wall" like in the old days, because most cameras automatically raises the "ISO speed equivalent" to compensate, but when you shoot in low light, the noise gets worse (just like using 800 film in the old days). You will see this in outdoor evening shots or indoor ones without a flash - which is where the DSLR will show a better result.) Even though most software like Photoshop offers "noise reduction", as do most cameras internally, there's no substitute for a good picture to begin with.
Some cameras and lenses are physically noisy, which might scare the birds or other animals if they're close. SLRs tend to be noisier because they have actual moving parts (the "reflex" part), and some make quite a thwack when the shutter clicks. (Some pros say that they use this... the first shot startles the birds to fly and be in the air for that second shot, so they just shoot a burst and get the birds taking off.)
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