Migrating Birds Sing to Team Up with Other Species
Briefly

The researchers found that solitary migrating songbirds seem to cooperate across species and possibly share information about who they were and what to watch out for ahead.
The conventional wisdom had been that each bird is following its own internal instinct... but generally they're just on their own. This study challenges that notion.
Flying in the dark presents challenges to airborne cooperation... This impelled Van Doren and his colleagues to look or rather, listen for other data.
It’s unclear why songbirds are spending so much energy and all this time making flight calls, but the study suggests it might be for interspecies cooperation.
Read at www.scientificamerican.com
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