I do not know the specific weight of the mangrove honeyeater, but it is small at only a body length of about 20 cm, so i can not imagine that it weighs a lot!
Mangrove Honeyeater was created in 1854.
alot
Guadalcanal Honeyeater was created in 1929.
Pied Honeyeater was created in 1830.
Helmeted Honeyeater was created in 1867.
Makira Honeyeater was created in 1870.
Banded Honeyeater was created in 1841.
Yodeling Honeyeater was created in 1875.
Painted Honeyeater was created in 1838.
Crow Honeyeater was created in 1860.
MacGregor's Honeyeater was created in 1897.
Brown Honeyeater was created in 1827.