''Nyctyornis'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of the

bee-eater The bee-eaters are a group of birds in the family (biology), family Meropidae, containing three genera and thirty-one species. Most species are found in Africa and Asia, with a few in southern Europe, Australia, and New Guinea. They are characte ...

s, near passerine

bird Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...

s in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Meropidae. There are just two members of this group, which occur in tropical south and southeastern

Asia Asia ( , ) is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometres, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which ...

. The genus ''Nyctyornis'' was introduced by the naturalists William Jardine and

Prideaux John Selby Prideaux John Selby FRSE Linnean Society, FLS (23 July 1788 – 27 March 1867) was an English ornithologist, botanist and natural history artist. Life Selby was born in Bondgate Street in Alnwick in Northumberland, the eldest son of George ...

in 1830. The name comes from the

Ancient Greek Ancient Greek (, ; ) includes the forms of the Greek language used in ancient Greece and the classical antiquity, ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Greek ...

''nukt'' meaning nocturnal or night and ''ornis'' meaning bird. A

molecular phylogenetic Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...

study published in 2007 showed that the genus is basal and forms a

sister group In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree. Definition The expression is most easily illustrated by a cladogram: Taxon A and ...

to the remaining members of the bee-eater family. Like other bee-eaters, ''Nyctyornis'' species are colourful birds with long tails, long downturned bills and pointed wings. They are large bee-eaters (blue-bearded is the largest of all bee-eaters), predominantly green, with a face colour as indicated by the species' name. This colour extends on to the slightly hanging throat feathers to form the "beard". The two ''Nyctyornis'' species are the only bee-eaters that lack an eye-stripe and that have bi-coloured beaks. Their calls also differ from those of other bee-eaters and are somewhat similar to the noises made by rollers. Their size and more rounded wings give a heavier flapping flight that is less graceful than that of members of the genus '' Merops''. In common with other bee-eaters, they predominantly eat

insect Insects (from Latin ') are Hexapoda, hexapod invertebrates of the class (biology), class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (Insect morphology#Head, head, ...

s, especially bees,

wasp A wasp is any insect of the narrow-waisted suborder Apocrita of the order Hymenoptera which is neither a bee nor an ant; this excludes the broad-waisted sawflies (Symphyta), which look somewhat like wasps, but are in a separate suborder ...

s and

hornet Hornets (insects in the genus ''Vespa'') are the largest of the Eusociality, eusocial wasps, and are similar in appearance to yellowjackets, their close relatives. Some species can reach up to in length. They are distinguished from other Vespi ...

s, which are caught in the air, but they have a rather different strategy. They hunt alone or in pairs, rather than in groups, and sit motionless for long periods before pursuing their prey. The blue-bearded bee-eater will also clamber in foliage for insects, and bees are sometimes attracted by the bright blue beard of a perched bird, presumably mistaking it for a flower. They nest in burrows tunneled into the side of sandy banks, but do not form colonies.

References

Sources

* {{Taxonbar, from=Q285047 Meropidae Taxa named by Sir William Jardine Taxa named by Prideaux John Selby