A taxonomic order of waterbirds including the sungrebes and finfoots, adapted for life in tropical freshwater habitats.
From heliornis + -thes (a taxonomic plural suffix). Follows modern ornithological naming conventions that group related bird genera into orders.
Heliornithes birds are so ancient that their exact evolutionary relationships stumped scientists for decades—they were grouped with cranes, rails, and grebes at different times, until DNA analysis finally revealed their true family tree!
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