# Biparental Care in a Southeast Asian Passerine, the Scarlet–Backed Flowerpecker (Dicaeum cruentatum)

## TL;DR

Both parents of scarlet-backed flowerpeckers care for their young by feeding them mistletoe fruits during the fledgling period in Thailand.

## Contribution

This study provides direct observations of biparental care in scarlet-backed flowerpeckers, a species previously understudied.

## Key findings

- Both parents fed the fledgling green mistletoe fruits over five days.
- The fledgling remained mostly stationary between feeding periods.
- Biparental care appears common in the flowerpecker family, though more observations are needed.

## Abstract

We opportunistically observed a nest pair of scarlet‐backed flowerpeckers (
Dicaeum cruentatum
) for 5 days during the fledging period in late February 2020 within the Sakaerat Biosphere Reserve, Nakhon Ratchasima, Thailand. We observed both parents feeding the fledgling, with either parent returning within 3–20 min of leaving to forage. Over 5 days, both parents fed the fledgling green mistletoe fruits (Dendrophthoe pentandra [L.] Miq., family Loranthaceae). Between feeding periods, the fledgling remained mostly stationary on its perch. Our observations are similar to those reported for other species in the flowerpecker family (Dicaeidae), suggesting that biparental care is relatively common across the flowerpecker family, though there remains a paucity of direct observations and reporting. By making direct observations and subsequent discussions, we can better understand the ecology and natural history of Dicaeidae species, ultimately aiding in their conservation.

Scarlet‐back flowerpeckers exhibit biparental care during the fledgling period. Both parents feed the fledgling green mistletoe fruits for a five‐day period within the Sakaerat Biosphere Reserve, Nakhon Ratchasima, Thailand.