The Maluridae are a
family of small, insectivouous
passerine
birds endemic to
Australia and
New Guinea. Commonly known as wrens, they are
unrelated to the
true wrens of the
Northern Hemisphere. The family includes 14
species of fairy-wren, 3 emu-wrens, and 10
grasswrens.
As with many other Australian creatures, and perhaps more
than most, the species making up this family were
comprehensively misunderstood by early researchers. They
were variously classified as
Old World flycatchers,
Old World warblers, and
Old World babblers. In the late
1960s morphological studies began to suggest that the
Australo-Papuan fairy-wrens, the grasswrens, emu-wrens and
two monotypic wren-like genera from New Guinea were related
and, following Charles Sibley's pioneering work on egg-white
proteins in the mid-1970s, Australian researchers introduced
the family name Maluridae in 1975. With further
morphological work and the great strides made in DNA
analysis towards the end of the 20th century, their position
became clear: the Maluridae are one of the many families to
have emerged from the great corvid radiation in Australasia.
Their closest relatives are the Meliphagidae (honeyeaters),
the Pardalotidae, and the Petroicidae (Australian robins).
Their obvious similarity to the wrens of Europe and America
is not genetic, but simply the consequence of convergent
evolution between more-or-less unrelated
species that share the same ecological niche.
Fairy-wrens are notable for several peculiar behavioral
characteristics. They are socially monogamous and sexually
promiscuous, meaning that although they form pairs
between one male and one female, each partner will mate with
other individuals and even assist in raising the young from
such pairings. Males of several species pluck petals of
conspicuous colors and display them to females for reasons
unknown. The song of fairy-wrens is pleasant and complex,
and at least two species (Superb and Splendid) possess, in
addition to the alarm calls common to - and universally
understood by - most small birds, another vocalization used
when confronted by predators. This, termed "Type II
Vocalization", is song-like and used when confronted by
calling
butcherbirds and sometimes other predatory birds, but
its purpose is unknown; it is certainly not a warning call.
Species of Maluridae (part of the super-family
Meliphagoidea)