Lutavis platypelvis was an unusual small land bird with a broad, shallow pelvis and relatively short legs. Its original description discussed possible leptosomiform affinities, but those similarities were explicitly regarded as speculative and the current London Clay synthesis places it among Telluraves without a secure ordinal assignment.

The large coracoid indicates a well developed flight apparatus despite some skeletal features that might otherwise suggest a less explosive take off. Its feeding ecology remains unknown. An arboreal or terrestrial generalist taking small invertebrates is possible, but there is no direct evidence to choose a detailed lifestyle.