Search Results for: Direction finding compasses
movement, often north and south, undertaken by many species of birds. bird movements include those made in response to changes in food availability, habitat, or weather. sometimes, journeys are not termed "true migration" because they are irregular (nomadism, invasions, irruptions) or in only one direction
flock, and can sometimes encode the gender of a migrating individual. [ ] they also likely serve to avoid collision in the air. [ ] nocturnal migration can also be monitored using weather radar data, [ ] which can be used to estimate the number of birds migrating on a given night, as well as the direction...
https://en.wikipedia.org/wiki/Migratory_birds