Haleakala National Park has released a new documentary that follows two biologists working to save Hawaii’s critically endangered forest birds.

The 7.5-minute film, “Heart of Maui,” describes the cause of the birds’ catastrophic decline and what is at risk if action is not taken soon, according to a news release from the park on Monday.

“Prior to the introduction of mosquitoes into Hawaii, forest birds were found from mauka to makai,” said Chief of Interpretation, Education & Volunteers Jin Prugsawan Harlow. “This film offers a rare glimpse into some of the only habitat that remains for these birds, on the eastern slopes of Haleakala.”

“Those who watch it will understand the critical need to control mosquitoes and avian malaria,” she added.

The film was funded by the National Park Service and the Haleakala Conservancy, the park’s official philanthropic partner. It was directed and filmed by David Ehrenberg.

To view “Heart of Maui,” visit nps.gov/media/video/view.htm?id=1184F741-74F4-46CC-BA60-B6933A6A2641.

For more information on the forest birds and the effort to save them, visit nps.gov/hale/learn/nature/saving-our-forest-birds.htm and haleakalaconservancy.org.