No, bats seem to fly with no set pattern at all, but they DO mass into groups for their nightly forage.
All geese like to fly in the V formation also known as a skein formation. This formation helps with their flying efficiency and how far they can fly.
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I watch Canadian Geese fly over my house in a v formation all the time. :-)
Migrating Canada Geese fly in a loose V formation.
There are many reasons that birds fly the way they do. One reason for why they fly in a V formation is because it reduces the air resistance on the birds in the back of the formation.
When they fly, it is the one in the front of the "V" formation.
all birds that fly in a V formation fly in the upwash from the wings of the bird ahead, which assists each bird in supporting its own weight. Drag is considerably decreased and thus rage of flight increased. Birds rotate to and from the front at time to time
Pelicans fly in formation to conserve energy and increase their aerodynamic efficiency. Flying in a V-formation reduces air resistance for the birds behind the leader, allowing them to fly more efficiently and cover longer distances.
Birds fly in a V formation to conserve energy and increase efficiency during long flights. The formation reduces wind resistance and allows birds to take turns leading, which helps them save energy by drafting off the bird in front of them.
Since geese fly in V formation to conserve energy by flying in the wake of the previous bird I believe that the longer arm of the V has less wind resistance and it therefore easier to fly in.
The geese fly in a V formation because they can flow off of each others air waves. It helps them be able to fly longer and farther before needing to rest.The goose in the front trades places with one of the back birds every once in a while.
During migration, birds fly in a V formation to conserve energy. The birds on one side of the V formation are typically more numerous because they benefit from reduced wind resistance and can take turns leading the flock.