Both adults take part in constructing large, bulky nests within the main fork of trees. These nests may also be built within the aforementioned Eucalyptus plantations present on the island.The only observed clutch size has been 2 eggs with the measurements of 57.0 x 41.2 and 60.0 x 42.7 mm. Henst's appear to exhibit some sort of site fidelity, where the previous year's nest is re-used or another one is built only a couple of hundred meters away from the original. Site fidelity is most likely explained by the specificity of preferred nest habitat to occur in old growth forests near water. Nest predation Although known as a climax predator within Madagascan rainforests, nest-predation has been observed within multiple Henst's goshawk populations. Following gestation, the female Goshawk will leave the nest unattended for long periods of time, while males only feed the chicks sporadically, leaving the nest vulnerable to predation events at the hands of Harrier-hawks, whereby chicks within unattended nests were quickly killed and consumed by a circling harrier-hawk on multiple occasions. Diet The Henst's goshawk is an adept forest predator whose diet mainly consists of medium to large sized birds and mammals. With powerful eyesight, large curved talons and a curved raptor beak it is an extremely adept predatory animal. Hunting occurs from a discrete tree perch or from low forest floor flight. Henst's goshawk will not leave the canopy cover while foraging. The preferred prey are lemurs and poultry that occur within primary forest habitat. The ability to hunt lemurs makes the Henst's goshawk an important part of the Madagascan food web. Henst's also does not exhibit a species preference and will hunt a large range of lemurs as well, ranging from 100g to 4kg. Thereby Henst's plays an important role in maintaining population health in Lemurs by reducing the abundance of diseased and old individuals, keeping the population healthy. Vocalizations The basic call is a loud, crackling and rapid "ang-ang-ang-ang...". These vocalizations can be heard crackling through the canopy when in flight. However, these calls are rarely heard as Henst's is a more secretive species. Except for the breeding season, when the Henst's goshawk can be very loud and vocal. They will utter a rapid succession of "keey-keey-keey' in order to communicate with potential breeding partners. Conservation An assessment by Birdlife International in 2016 has placed Accipiter Henstii as Vulnerable on the IUCN Red List. The