Cissa katsumatae

Adult Indochinese Green Magpies are instantly recognizable by their vivid green plumage, which contrasts sharply with their bright red bills and legs. Their eyes are encircled with black, creating a mask-like appearance, which is a distinctive field mark. Juveniles differ slightly, displaying a duller coloration and less pronounced red on their bills and legs. Males and females appear similar, with no significant sexual dimorphism in plumage or size, which can make field identification challenging. However, during breeding seasons, males may exhibit slightly brighter colors. While the Indochinese Green Magpie is similar in appearance to the Common Green Magpie (Cissa chinensis), it can be distinguished by its more restricted range and slight differences in vocalizations. The magpie's flight silhouette is characterized by broad, rounded wings and a relatively long tail, which it often fans out during short flights between trees. When perched, it maintains an upright posture, often turning its head sharply to scan its surroundings.

The diet of the Indochinese Green Magpie is both diverse and adaptable, reflecting its omnivorous nature. Insects form a significant portion of its diet, with preferences for beetles, caterpillars, and other arthropods. It also preys on small vertebrates such as lizards and occasionally takes small birds and their eggs. Fruits and berries constitute an essential part of their diet, especially during the non-breeding season when animal prey is less abundant. The magpie employs a variety of foraging techniques, including gleaning insects from leaves and branches and occasionally foraging on the ground. It typically feeds throughout the day, with peaks in activity during the early morning and late afternoon.

The Indochinese Green Magpie displays a complex social structure typical of the Corvidae family. These birds often form small family groups outside of the breeding season but become highly territorial when nesting. Territorial disputes are marked by vocal displays and aggressive posturing. Courtship involves elaborate aerial displays, where males showcase their agility and the vibrancy of their plumage to attract females. This species is predominantly diurnal, with most activity occurring during daylight hours. Like many corvids, the Indochinese Green Magpie is highly intelligent, exhibiting problem-solving skills and excellent memory for storing food caches. It is generally wary of humans and predators, using alarm calls to alert other members of its group to danger. Flocking behavior is more common in non-breeding periods, providing safety in numbers against predators.

The nesting habits of the Indochinese Green Magpie are intricate and involve both sexes in preparation and care. Nests are typically constructed in dense foliage, often high in the canopy, to protect against predators. They are cup-shaped and made from twigs, leaves, and roots, lined with softer materials like grass and feathers. A typical clutch consists of 3 to 5 eggs, which are incubated primarily by the female while the male provides food. Incubation lasts approximately 17 to 21 days, after which both parents share feeding duties. Chicks fledge around 4 weeks after hatching, though they remain dependent on their parents for another few weeks. The species typically raises one brood per year, although favorable conditions can sometimes lead to a second.

The vocalizations of the Indochinese Green Magpie are varied and complex, playing a crucial role in communication. Its primary song is a series of high-pitched, melodious whistles, often delivered from a concealed perch. This song serves both to establish territory and attract mates. In addition to its song, the bird produces a range of harsh calls and chattering sounds used in social interactions and as alarm calls. During dawn and dusk, the magpie participates in a dawn chorus, with its song standing out due to its clarity and variation. The alarm calls are short and sharp, alerting other birds to the presence of predators.

• 1The Indochinese Green Magpie can mimic the calls of other bird species, a trait that aids in its survival.
• 2Its bright green plumage can shift to a more bluish hue due to the unique structural composition of its feathers.
• 3Despite being called a magpie, it is more closely related to jays and treepies in the Corvidae family.
• 4The Indochinese Green Magpie can cover a range of over 20 kilometers in a day while foraging.
• 5This magpie species plays a crucial role in seed dispersal, aiding in forest regeneration.
• 6They are capable of using simple tools, showcasing intelligence typical of the Corvidae family.
• 7In local folklore, the Indochinese Green Magpie is often seen as a bird of good omen, bringing prosperity.

The Indochinese Green Magpie is currently classified as Near Threatened by the IUCN. The primary threats to its population include habitat loss due to logging and agricultural expansion, which lead to significant fragmentation of its forest habitat. While historical population data is limited, there is evidence to suggest a decline in numbers, particularly in areas where deforestation is rampant. Conservation efforts focus on habitat protection and the establishment of protected areas within its range. Initiatives to promote sustainable forestry practices are also vital in ensuring the long-term survival of this species.