THE WORLD BIRDS - An Online Bird Book
KINGFISHERs
of The World - River Kingfishers
Order Coraciiformes Family Alcedinidae
The kingfisher family Alcedinidae belongs to the Coraciiformes order, as do the
bee-eaters of family Meropidae, the
motmots of family Momotidae, the
rollers of families Brachypteraciidae and Coraciidae, and the
todies of family
Todidae.
Common Kingfisher Image by Luca Casale
Kingfishers are a group of small to medium sized brightly colored birds in the order Coraciiformes. They have a cosmopolitan distribution, with most species found outside of the Americas.
There are about 110 species of kingfisher. All have large heads, long, sharp, pointed bills, short legs, and stubby tails. The typical kingfisher has three toes pointing forward and one to the rear, with the third and fourth toes partially fused together. The bill is usually longer and more compressed in species that hunt fish, and shorter and more broad in species that hunt prey off the ground. Most species have bright plumage with little differences between the sexes. There is also little difference in the length or weight of the sexes. Some species have males slightly larger than females, but other species have the females listed as slightly larger than the males.
The kingfishers are separated into three subfamilies:
River Kingfishers (Alcedinina),
Tree Kingfishers (Halcyoninae), and
Water Kingfishers (Cerylinae). This article is about the River Kingfishers which are also know as Pygmy KIngfishers.
River Kingfishers
Family Alcedinidae Subfamily Alcedininae
The
river kingfishers are one of the three subfamilies in the kingfisher group. They are widespread through Africa, east and south Asia as far as Australia, with one species, the common kingfisher, also appearing in Europe and northern Asia. These are brightly plumaged compact birds with short tails, large heads and long bills. They feed on insects or fish, and lay white eggs in a self excavated burrow. "River" can be somewhat of a misnomer for many of these species as they are not dependent on water for food. These Alcedininae kingfishers have also been called pygmy kingfishers. While the majority of this subfamiy are indeed small, there are quite a few exceptions to this characterization too. Approximately 20 species have "dwarf", "pygmy", or "little" as part of their name.
There are 39 Alcedininae kingfishers which are contained in 5 genera: Alcedo(7), Ceyx(22), Corythornis(4), Ispidina (2), Lacedo(1), and Pelargopsis(3) where the number in parenthesis indicates the species in the genus.
The Alcedo kingfishers all eat fish. Some also eat small crustaceans, aquatic insects, and larvae. The generally forage by sitting on a perch looking in the water below for prey. They all have some blue feathers on their upperparts and most species some rufous in their plumage and also have a black bill. The female generally has more red on the lower mandible than the male. The smallest species is the cerulean kingfisher which is about 13 cm long The largest is Blyth's kingfisher with a length of 22 cm.
All except one of the kingfishers in Ceyx have three rather than the usual four toes. The exception is the Sulawesi dwarf kingfisher which retains a vestigial fourth toe. They are found from South East Asia to the Solomon Islands. Compared to the related kingfishers in the Alcedo genus, the Ceyx kingfishers are more terrestrial and their diet consists mainly of insects. These are small kingfishers - the majority are less than 15 cm long. The six African species in Ispidina and Lacedo are also small, none longer than 14 cm. The largest of the Alcedininae kingfishers are found in genus Pelargopsis with the biggest being the great-billed kingfisher which is 35 cm long and can weigh up to 200 grams.
They Alcedininae kingfishers lay white eggs in a tunnel that is constructed in the ground by both parents. Both adults also incubate the eggs and feed the chicks. The length of the nest-tunnels depend on the size of the species and also the material in which the tunnel is constructed. These tunnels range from 5 to 100 cm in length. A large bird and soft material favors a longer tunnel.
Genus Alcedo
The Alcedo kingfishers all eat fish. Some also eat small crustaceans, aquatic insects, and larvae. The generally forage by sitting on a perch land looking in the water below for prey. They all have some blue feathers on their upperparts and most species some rufous in their plumage and also have a black bill. The female generally has more red on the lower mandible than the male. The smallest species is the cerulean kingfisher which is about 13 cm long The largest is Blyth's kingfisher with a length of 22 cm. Both partners help excavate nest-tunnels and incubate the eggs. The tunnels for these relatively small species average about 50 cm in length.
Kingfisher,_Blue-banded Alcedo euryzona
Image by:
1)
John Gerrard Keulemans 2)
Mike_Prince 3)
Mark Benedict - Borneo
4)
lonelyshrimp - Thailand
1) Left: male Right: female
2) Female 3, 4) Male
Kingfisher,_Blue-eared Alcedo meninting
Image by: 1) )
David Dennis - Malaysia 2)
Shrikant_Rao - India 3)
David_Cook - Borneo
Kingfisher,_Blyth's
Alcedo hercules
Image by:
1)
Discovery_Times 2)
Henry_Koh
Kingfisher,_Cerulean Alcedo coerulescens
Image by: 1)
Aaron Maizlish 2)
Francesco_Veronesi 3)
Lip Kee
3) Male
Kingfisher,_Common Alcedo atthis
Image by: 1)
Ravi Vaidyanathan 2) Lukasz Lukasik 3)
Andrej_Chudy. - Slovakia 4)
Cristiano Crolle - Naole, Italy
Kingfisher,_Half-collared Alcedo semitorquata
All except one of the kingfishers in Ceyx have three rather than the usual four toes. The exception is the Sulawesi dwarf kingfisher which retains a vestigial fourth toe. Compared to the related kingfishers in the Alcedo genus, the Ceyx kinfishers are more terrestrial and their diet consists mainly of insects. These are small kingfishers - the majority are less than 15 cm long. Both partners help excavate nest-tunnels and incubate the eggs. The tunnels for these small species are usually less than 20 cm long. The species are found from South East Asia to the Solomon Islands.
The rest of the species in this Ceyx section were formerly considered to be a subspecies of the variable dwarf kingfisher which is now called the Moluccan dwarf kingfisher. These recently elevated species are located on islands, and due to their isolation they have evolved to have subtle differences from each other. They all have "dwarf" as part of their names as they are all small kingfishers, 12 to 15 cm in length. Because of the remote locations, few photographs are available for these species.
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These small African kingfishers
are all about 13 cm long. Both partners help excavate nest-tunnels and incubate the eggs. The tunnels for these small species average about 40 cm long.
These two species are small African kingfishers. Both partners help excavate nest-tunnels and incubate the eggs. The tunnels for these small species average about 20 cm long.
These are very large kingfishers. Their flight is flapping, but direct. They inhabit well wooded habitats near water. They are territorial and will chase away eagles and other large predators. These species hunts crabs, fish, frogs, Sexes are similar.
Both partners help excavate nest-tunnels and incubate the eggs. The tunnels average about 40 cm long.