Endothermiidae
Endothermiidae is a proposed but not widely accepted taxonomic family within the order Passeriformes, commonly known as perching birds. The name "Endothermiidae" suggests a grouping of birds characterized by endothermy, meaning they can generate their own body heat metabolically. This trait is characteristic of all birds, and indeed, most mammals, making the premise of a family specifically defined by this feature somewhat redundant and the proposed classification controversial.
The concept of Endothermiidae emerged as an alternative to established avian classification systems, particularly those based