Species of Thailand
Binomial name: Ploceus philippinus, Carolus Linnaeus, 1766
The baya weaver (Ploceus philippinus) is a weaverbird found across the Indian Subcontinent and Southeast Asia. Flocks of these birds are found in grasslands, cultivated areas, scrub and secondary growth and they are best known for their hanging retort shaped nests woven from leaves. These nest colonies are usually found on thorny trees or palm fronds and the nests are often built near water or hanging over water where predators cannot reach easily. They are widespread and common within their range but are prone to local, seasonal movements mainly in response to rain and food availability.
Among the population variations, three subspecies are recognized. The nominate race philippinus is found through much of mainland India while burmanicus is found eastwards into Southeast Asia. The population in southwest India is darker above and referred to as subspecies travancoreensis.
These are sparrow-sized (15 cm) and in their non-breeding plumage, both males and females resemble female house sparrows. They have a stout conical bill and a short square tail. Non-breeding males and females look alike, dark brown streaked fulvous buff above, plain (unstreaked) whitish fulvous below, eyebrow long and buff coloured, bill is horn coloured and no mask. Breeding males have a bright yellow crown, dark brown mask, blackish brown bill, upper parts are dark brown streaked with yellow, with a yellow breast and cream buff below.
Behaviour and ecology
Baya weavers are social and gregarious birds. They forage in flocks for seeds, both on the plants and on the ground. Flocks fly in close formations, often performing complicated manoeuvres. They are known to glean paddy and other grain in harvested fields, and occasionally damage ripening crops and are therefore sometimes considered as pests. They roost in reed-beds bordering waterbodies. They depend on wild grasses such as Guinea grass (Panicum maximum) as well as crops like rice for both their food (feeding on seedlings in the germination stage as well as on early stages of grain) and nesting material. They also feed on insects (including butterflies), sometimes taking small frogs, geckos and molluscs, especially to feed their young. Their seasonal movements are governed by food availability. Their calls are a continuous chit-chit-... sometimes ending in a wheezy cheee-eee-ee that is produced by males in a chorus. A lower intensity call is produced in the non-breeding season.
They are occasionally known to descend to the ground and indulge in dust bathing.
In captivity, individuals are known to form stable peck orders.
The breeding season of the baya weavers is during the monsoons. The breeding condition is initiated by environmental characters such as day length and comes to an end after summer although this termination is not influenced by short day length as in temperate birds. They nest in colonies typically of up to 20-30, close to the source of food, nesting material and water. Baya weavers are best known for the elaborately woven nests constructed by the males. These pendulous nests are retort-shaped, with a central nesting chamber and a long vertical tube that leads to a side entrance to the chamber. The nests are woven with long strips of paddy leaves, rough grasses and long strips torn from palm fronds. Each strip can be between 20 and 60 cm in length. A male bird is known to make up to 500 trips to complete a nest. The birds use their strong beaks to strip and collect the strands, and to weave and knot them while building their nests. The nests are often built hanging over water from palm trees and often suspended from thorny Acacias and in some cases from telephone wires. Although the birds prefer thorny trees, they sometimes use avenue trees in urban areas. Nests are often located on the eastern side of the tree, where they are believed to provide shelter from the Southwest Monsoon; however, late breeders are more likely to build their nests in other orientations relative to the trunk of the nest tree. Abandoned nests are sometimes used by mice (Mus booduga) and other birds such as munias.
Nests are built mainly in colonies but isolated nests are not unknown. Nests are often built from thorny Acacia or palm trees ( mainly Phoenix sylvestris) and hang over open water. Young males may build experimental nests among reeds. In Burma, birds often build nests under the eaves of buildings, but this habit is uncommon in India. The males take about 18 days to construct the complete nest with the intermediate "helmet stage" taking about 8 days. The nests are partially built before the males begin to display to passing females by flapping their wings and calling while hanging from their nests. The females inspect the nest and signal their acceptance of a male. Once a male and a female are paired, the male goes on to complete the nest by adding the entrance tunnel. Males are almost solely in charge of nest building, though their female partners may join in giving the finishing touches, particularly on the interiors. Females may modify the interiors or add blobs of mud. A study has found that nest location is more important than nest structure for the female when it selects the nest and mate. Females prefer nests high in trees, those over dry land, and those on thin branches.
Both males and females are polygamous. Males build many partial nests and begin courting females. The male finishes the nest only after finding a mate. The female lays about 2 to 4 white eggs and incubates them for about 14 to 17 days. Males may sometimes assist in feeding the chicks. The chicks leave the nest after about 17 days. After mating with a female the male typically court other females at other partially constructed nests. Intraspecific brood parasitism is known, that is, females may lay their eggs in the nests of others.
Young birds leave the nest in a juvenal plumage which is replaced in their first moult after about four to six months. The young disperse to new locations not far from their nest and young have been located up to two kilometres away from their origin. Females are capable of breeding after a year while males take half a year longer. Prior to breeding they go through a prenuptial moult. Adults also go through a second moult after breeding and thus there are two moults each year. Histochemical studies have shown increased lipid metabolism in the crown region of male Baya during the breeding season. Lipids are known to be involved in the transport of the yellow carotenoid pigments that form the crown and are subsequently metabolized.
The nest, being suspended from thorny trees and overhanging water, is protected from many predators, but nest predation by crows is not unusual. Brood may also be destroyed by lizards such as Calotes versicolor or rodents such as Vandeleuria oleracea which may take over the nest. Nests may sometimes be taken over and used for nesting by Indian silverbills (Euodice malabarica).
A widespread folk belief in India is that the baya sticks fireflies with mud to the nest walls to light up the interior of the nest at night. Clay, however is known to be used in the nests of baya weavers. Males alone have been seen to add blobs of mud and dung to the nest chamber prior to pairing with a female. It has been suggested that the clay may help to stabilise the nest in strong winds.
In earlier times, the baya weaver was trained by street performers in India for entertainment. They could pick up objects at the command of their trainers. They were trained to fire toy cannons, string beads, pick up coins and other objects. These uses have been noted from the time of Akbar.
Tokora, tokora chorai (Assamese); baya, son-chiri (Hindi); bayya chirya (Urdu: بیّا چڑیا ); baya chadei (Oriya); sugaran (Marathi); tempua (Malay); sughari (Gujarati); babui (Bengali); parsupu pita, gijigadu/gijjigadu (Telugu); gijuga (Kannada); thukanam kuruvi (Malayalam); thukanan-kuruvi (Tamil); wadu-kurulla, tatteh-kurulla, goiyan-kurulla (Sinhala); sa-gaung-gwet, mo-sa (Myanmar); bijra (Hoshiarpur); suyam (Chota Nagpur), bagra(Maithili).
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- Ploceus philippinus
Least Concern (IUCN3.1)
- Amphawa District, Samut Songkhram
- Ban Chang District, Rayong
- Ban Laem District, Phetchaburi
- Ban Lat District, Phetchaburi
- Ban Phai District, Khon Kaen
- Bang Ban District, Phra Nakhon Si Ayutthaya
- Bang Lamung District, Chonburi
- Bang Len District, Nakhon Pathom
- Bang Pa In District, Phra Nakhon Si Ayutthaya
- Bang Pahan District, Phra Nakhon Si Ayutthaya
- Bang Phra Non-hunting Area
- Bang Pu Recreation Centre
- Bangkok Province
- Borabue District, Maha Sarakham
- Bueng Boraped Non-hunting Area
- Buntharik District, Ubon Ratchathani
- Chatturat District, Chaiyaphum
- Chiang Dao District, Chiang Mai
- Chiang Dao Wildlife Sanctuary
- Chiang Saen District, Chiang Rai
- Doi Inthanon National Park
- Doi Lo District, Chiang Mai
- Doi Pha Hom Pok National Park
- Doi Suthep-Pui National Park
- Fang District, Chiang Mai
- Hala-Bala Wildlife Sanctuary
- Hang Chat District, Lampang
- Hat Yai District, Songkhla
- Hua Hin District, Prachuap Khiri Khan
- Huai Chorakhe Mak Reservoir Non-hunting Area
- Huai Talat Reservoir Non-hunting Area
- Kabin Buri District, Prachinburi
- Kaeng Khoi District, Saraburi
- Kaeng Krachan District, Phetchaburi
- Kaeng Krachan National Park
- Kamphaeng Saen District, Nakhon Pathom
- Kantharawichai District, Maha Sarakham
- Khao Sam Roi Yot National Park
- Khao Soi Dao Wildlife Sanctuary
- Khao Sok National Park
- Khao Yai National Park
- Khao Yoi District, Phetchaburi
- Khlong Luang District, Pathum Thani
- Kui Buri National Park
- Kumphawapi District, Udon Thani
- Laem Pak Bia
- Mae Ai District, Chiang Mai
- Mae Taeng District, Chiang Mai
- Mu Ko Lanta National Park
- Mueang Buriram District, Buriram
- Mueang Chachoengsao District, Chachoengsao
- Mueang Chiang Mai District, Chiang Mai
- Mueang Chiang Rai District, Chiang Rai
- Mueang Kanchanaburi District, Kanchanaburi
- Mueang Khon Kaen District, Khon Kaen
- Mueang Krabi District, Krabi
- Mueang Lampang District, Lampang
- Mueang Maha Sarakham District, Maha Sarakham
- Mueang Nakhon Nayok District, Nakhon Nayok
- Mueang Nakhon Si Thammarat District, Nakhon Si Thammarat
- Mueang Nonthaburi District, Nonthaburi
- Mueang Pan District, Lampang
- Mueang Phatthalung District, Phatthalung
- Mueang Phetchaburi District, Phetchaburi
- Mueang Phitsanulok District, Phitsanulok
- Mueang Ratchaburi District, Ratchaburi
- Mueang Samut Sakhon District, Samut Sakhon
- Mueang Samut Songkhram District, Samut Songkhram
- Mueang Satun District, Satun
- Mueang Songkhla District, Songkhla
- Mueang Suphanburi District, Suphan Buri
- Mueang Tak District, Tak
- Mueang Uttaradit District, Uttaradit
- Nong Bong Khai Non-hunting Area
- Nong Song Hong District, Khon Kaen
- Nong Suea District, Pathum Thani
- Pai District, Mae Hong Son
- Pak Chong District, Nakhon Ratchasima
- Pak Phli District, Nakhon Nayok
- Pak Thale
- Pak Tho District, Ratchaburi
- Phanat Nikhom District, Chonburi
- Phatthana Nikhom District, Lopburi
- Phayuha Khiri District, Nakhon Sawan
- Phra Nakhon Si Ayutthaya District, Phra Nakhon Si Ayutthaya
- Phra Phrom District, Nakhon Si Thammarat
- Phutthamonthon District, Nakhon Pathom
- Pran Buri District, Prachuap Khiri Khan
- Sai Noi District, Nonthaburi
- Sai Yok District, Kanchanaburi
- Sakaerat Environmental Research Station
- Samut Prakan Province
- San Sai District, Chiang Mai
- Sanam Bin Reservoir Non-hunting Area
- Sathing Phra District, Songkhla
- Sattahip District, Chonburi
- Si Maha Phot District, Prachinburi
- Takua Pa District, Phang Nga
- Taphan Hin District, Phichit
- Tha Chang District, Sing Buri
- Tha Takiap District, Chachoengsao
- Tha Yang District, Phetchaburi
- Thale Noi Non-hunting Area
- Thanyaburi District, Pathum Thani
- Thawat Buri District, Roi Et
- Wang Noi District, Phra Nakhon Si Ayutthaya
- Wat Phai Lom & Wat Ampu Wararam Non-hunting Area
- Watthana Nakhon District, Sa Kaeo
- Wiang Kaen District, Chiang Rai
Range map of Ploceus philippinus in Thailand
Important note; our range maps are based on limited data we have collected. The data is not necessarily accurate or complete.
Special thanks to Ton Smits, Parinya Pawangkhanant, Ian Dugdale and many others for their contribution for range data.
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