The mangrove gerygone (Gerygone levigaster) is a species of bird in the Australian warbler family Acanthizidae. The species is also known as the mangrove warbler. The species is thought to form a superspecies with the closely related fan-tailed gerygone of Melanesia and the Australian western gerygone. There are three subspecies of mangrove gerygone, G. l. pallida, found in southern New Guinea, the nominate race G. l. levigaster, which is found from coastal Western Australia to coastal north Queensland, and G. l. cantator, which is found from coastal Queensland to New South Wales. The species is uncommon in New Guinea and has suffered some declines due to mangrove clearances but is not considered threatened by the IUCN.

The species is princiapally distributed in mangrove forests and in forests and woodland adjacent to mangroves. The species will move into nearby forests from mangroves to feed, particularly in the breeding season. Where its range overlaps with that of the large-billed gerygone in the Kimberley it is actually displaced from the mangroves and is instead found in scrubland dominated by paperbarks and acacia.

The mangrove gerygone is a typical member of the genus Gerygone, they are small birds with rounded wings, 9–11 cm long and weighing 6 g. The plumage is grey above with a white throat, belly, flanks and rump. There is a distinct white eye stripe. The bill and legs are black and the iris is red. The subspecies G. l. pallida is slightly browner above and G. l. cantator is slightly larger and heavier. The song, which is similar to that of the western gerygone, has been described as "sweet, rich, tuneful".

The species feeds in the foliage of trees on insects, including beetles, grasshoppers, wasps, ants and moths. It is less likely to catch prey in the air than other gerygones, but will join mixed-species feeding flocks with white-eyes, honey-eaters and fantails. The species mostly feeds in the canopy but will forage amongst the roots of mangroves.

The mangrove gerygone breeds throughout the year, although principally in spring-summer in the east of Australia and during the dry season in the north. The female builds the oval domed nest. It is constructed out of roots, grass, spider webs, moss, seaweed and bark, and hangs from mangroves. Two to three eggs, are laid in the nest and are incubated for 14–17 days. Both parents feed the chick for another 14–17 days. A number of cuckoo species are brood parasites of this species.
Mangrove Gerygone
Date Location Count
2019-10-19 08:28Crescent Lake (Willie Creek) (restricted access)2
2019-10-10 16:11Roebuck Plains Station (BBO and Jabiru Paddocks)4
2019-10-23 14:15Ram-Paddock Well (restricted access)1
2019-10-10 08:52East Point1
2019-10-15 16:59East Point Mangrove Boardwalk1
2019-10-20 09:02Port Bundaberg (restricted access)5
2019-10-21 11:58Eli Creek near mouth (Point Vernon)1
2019-10-19 16:45Maaroom2
2019-10-13 08:46Maroochy Wetland Sanctuary3
2019-10-19 08:55Beacon Lighthouse Reserve1
2019-10-19 12:18Toorbul1
2019-10-22 16:22Deception Bay Foreshore1
2019-10-15 11:30White Patch/Wright's Creek3
2019-10-15 08:00Bribie Island
2019-10-23 16:32Tinchi Tamba Wetlands Reserve1
2019-10-20 06:45Buckleys Hole (Bongaree)1
2019-10-20 09:25Red Beach Rd to Buckleys Hole via Beach3
2019-10-23 16:38Boondall Wetlands Reserve1
2019-10-21 15:25Oxley Creek Common3
2019-10-15 14:57Tabbil-ban dhagun Boardwalk
2019-10-19 05:10Kedron Brook Wetlands Reserve5
2019-10-19 06:22Kedron Brook Bikeway (near wetlands)4
2019-10-15 15:53Kedron Brook Bikeway (near Nudgee Golf Club)2
2019-10-23 07:10Kianawah Road Wetland (Hemmant)2
2019-10-23 10:05Port of Brisbane Shorebird Roost2
2019-10-23 07:58Lytton Wader Roost and Wynnum Mangrove Boardwalk2
2019-10-10 06:20Wynnum Mangrove Boardwalk2
2019-10-23 09:15Davenport Drive Viewing Platform2
2019-10-23 09:40Queen Victoria Boat Ramp (Lota)4
2019-10-23 05:50Beveridge Road Creek Corridor, Eprapah Creek (Thornlands)4
2019-10-13 05:50Eagleby Wetlands1
2019-10-13 10:11Point Halloran--NE corner mudflats1
2019-10-13 10:36Jabiru Is, Phil Hill Environmental Park, Coomera2
2019-10-20 08:48Brunswick Heads Nature Reserve at -28.53332, 153.552841
2019-10-22 06:30Teven Rd Swamp
2019-10-11 09:23Ash Island1
2019-10-16 07:46Stockton Sandspit1
2019-10-18 07:57Urunga Boardwalk2
2019-10-10 14:15Quarry Street Track, South West Rocks Creek1
2019-10-23 13:30Boyters Lane, Jerseyville1
2019-10-11 07:59Woregore NR, Pelican Island, Port Macquarie2