The insect doesn't start flying with jump they start flapping with high frequencies some of them few hundreds of Hz. Even Hummingbirds start their flight as insects because they are relatively small. Many of the most largest birds starting their flights usually from some place high over the ground or run ( always against the wind)for awhile to pick up initial flight speed ( swans ,albatrosses ,etc) they experienced lack of enough power . The hummingbirds hoovering flight is so energy expensive that they have to drink all the day "high octane " carbohydrates (nectar) in amounts equal to their weight !
Starting with middle size birds most of them can't fly vertically ( pigeons can but they have spetiall shoulder joint wich allow larger angles of rotation of their wings similar to hummingbirds ) many of smal to middle size predators are abble of hoovering for short periods.
Generally the birds are very smart flyers and alweys use wind, ridge upstreems,thermals etc to save energy!