There are some types of Hummingbirds that weigh a bit over the weight of an insect. I'm not sure about under their weight though. Try looking up 'Hummingbirds' on Wikipedia.
When its average density is less than the liquid or gas that it is in.
Humming bird eats food which is more than its weight.
The weight of the sail boat is less than the weight of the water it displaces. That is its density is less than that of water.
Less
A bird flying can carry more than its own weight, up to half of its total weight. For example, an eagle can lift off with a fish heavier than itself, provided it does not weigh half than its total weight.
what would happen to a car if its reaction force was less than the weight
No, because the fact that the ball with less weight bounces about couple centimeters than an other ball that has more weight.
The weight of an object is slightly less at the equator than at the poles because of the earth's tilt on its axis.
The mass is less than 1 kg.
no it is not less than one gram;) is weighs a bit more
The moon has less mass than Earth so its gravitational pull is less. Your weight decreases, but you retain the same mass.
Usally less than a pound.