Water Bugs

Whirligig Beetle

Whirligig Beetles are typically found in groups making crazy circles at the surface, although they are also capable of diving and flying. These are 'true beetles', not bugs. They are harmless scavengers.

-- Wikipedia

Note:

The rest of these bugs have a painful bite, like a wasp sting.

Water Scorpion

Above is the aptly-named Water Scorpion. These are generally found underwater in plant growth, although they fly very well, as do all waterbugs. If you are launching the boat through weeds, watch out for them, although you'd have to go out of your way to actually get bit.

-- Wikipedia


Water Boatman

In my experience, Water Boatmen are the most common waterbugs - you can find them in almost any still waters. They swim right-side-up with enlarged back legs. Water Boatmen feed primarily on algea, and are unlikely to bite.

-- Wikipedia


Backswimmer

Backswimmers are similar to Water Boatmen, but swim upsidedown, as their name implies. They are predatory, and have a painful bite.

-- Wikipedia


Giant Water Bug

You are more likely to see a Giant Water Bug on your porch than out on the lake. This is because they are strong night fliers, and attracted to lights. Like all waterbugs, they can bite, and given the size of them - 'Giant' - I imagine they bite pretty good.

-- Wikipedia


These are all long-legged, long-necked wading birds typically seen near the water's edge. They will tolerate your approach to a point, and then fly away - one of the advantages of being a bird.

Snowy Egret

The Snowy Egret is very easy to spot, because it makes no attempt at camouflage, and stands out in any environment. They make up for this by being rather wary, although I have seen individuals beg for food from fishermen, a learned behavior that is not common. The Snowy Egret is very common; it would be difficult to go out kayaking and not spot at least one.