Pīwakawaka | Tirairaka | Fantails are notoriously hard to photograph in flight as they flit, dart, squirl in the air. 🐦
Today was apparently "Sit On The Railing Day" which gave me a rare chance.

For comparison:
Piwakawaka: Length: 16 cm; Weight: 8 grams. (Not sure if the length includes the tail…)
Sparrow: Length: 15 cm; Weight: 28 grams.