Apapane vs Ou

In short

The 'Apapane and 'O'ū are both Hawaiian honeycreepers, but they can be distinguished by their bill shape and plumage. The 'Apapane has a long, decurved bill and bright crimson plumage, while the 'O'ū has a heavy, parrotlike bill and olive green plumage with a bright yellow head in males.

Identification tips

1. Bill Shape: 'Apapane has a long, decurved bill; 'O'ū has a heavy, parrotlike bill. 2. Plumage: Look for the 'Apapane's bright crimson color versus the 'O'ū's olive green with a yellow head in males. 3. Behavior: Note the 'Apapane's active foraging among flowers compared to the 'O'ū's more stationary, horizontal perching. 4. Habitat: Consider the elevation and type of forest; 'Apapane are often in 'ōhi'a-dominated areas.

Size

The 'O'ū is medium-sized and plump, while the 'Apapane is generally smaller and more slender.

Plumage

The 'Apapane is bright crimson with black wings and tail, and prominent white undertail-coverts. The 'O'ū is olive green with a bright yellow head in males, and females are dull olive green with a paler gray olive below.

Behaviour

The 'Apapane is known for its wide-ranging flights in search of 'ōhi'a flowers and is often seen moving quickly among flower clusters. The 'O'ū tends to perch horizontally on branches with a slightly raised tail, giving it a pot-bellied appearance.

Habitat

The 'Apapane is common in mesic and wet forests above 1,000 m on several Hawaiian islands, while the 'O'ū's historical range is less clear due to its rarity.

Voice

The 'Apapane has a diverse array of songs and calls that vary between islands, while specific vocalization details for the 'O'ū are not well-documented.