Ecology

Associations

Known predators

Tyrannidae (flycatcher) is prey of:
Accipiter gentilis

Based on studies in:
USA: Arizona (Forest, Montane)

This list may not be complete but is based on published studies.
  • D. I. Rasmussen, Biotic communities of Kaibab Plateau, Arizona, Ecol. Monogr. 11(3):228-275, from p. 261 (1941).
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Known prey organisms

Tyrannidae (flycatcher) preys on:
Cicadellidae
Orthoptera
Hemiptera
Lepidoptera
Gryllidae
cactus weevils
Moneilema
Palo Verde weevil
Diptera

Based on studies in:
USA: Arizona (Forest, Montane)
USA: Arizona, Sonora Desert (Desert or dune)

This list may not be complete but is based on published studies.
  • D. I. Rasmussen, Biotic communities of Kaibab Plateau, Arizona, Ecol. Monogr. 11(3):228-275, from p. 261 (1941).
  • P. G. Howes, The Giant Cactus Forest and Its World: A Brief Biology of the Giant Cactus Forest of Our American Southwest (Duell, Sloan, and Pearce, New York; Little, Brown, Boston; 1954), from pp. 222-239, from p. 227.
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Evolution and Systematics

Evolution

Discussion of Phylogenetic Relationships

View Tyrannidae Tree

Relationships after Tello et al. (2009), Ohlson et al. (2008), and others.
Tello et al. (2009) offer a new classification as well as a phylogeny, from which this page departs slightly for two reasons: acceptance of a more traditional definition of Tyrannidae, and a desire to avoid naming groups that are not clearly monophyletic. Tyrannidae here is their Tyrannoidea; their Tyrannidae excludes Rhynchocyclinae. Tello et al. define a subfamily Tyranninae consisting of Myiarchini, Tyrannini, Attila, and the clade contaiing Ramphotrigon, but that group is not clearly monophyletic. Tello et al. defined a new family, Rhynchocyclidae, but because it is included within Tyrannidae as defined here, it has been demoted to a subfamily, and subfamilies within it are demoted to tribes. Taxonomic ranks being arbitrary, this does no violence to the authors' conception.

My criteria for acceptance of taxa within Tyrannidae is that they must have strong bootstrap support from at least one study and no strong contradiction from any, or must be supported (though not strongly) by at least two studies using independent data. For technical reasons, Bayesian posteriors are not considered strong support. Genera are listed as "not monophyletic" if there is strong bootstrap support against monophyly in any study (e.g. Ramphotrigon), and as "may not be monophyletic" if there is weak support against monophyly in at least one study and no strong contradiction.

Ramphotrigon is paraphyletic, as Deltarhynchus is embedded within it (Ohlson et al. 2008). The probable solution is submergence of the latter.

Piprites is traditionally grouped with the manakins (Pipridae), but both Tello et al. (2009) and Ohlson et al. (2008) place it within Tyrannidae. However, neither study has any support for its position within the family; it's probably somewhere near the base of the family.

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
                                        
Specimen Records:4,028Public Records:1,101
Specimens with Sequences:2,403Public Species:230
Specimens with Barcodes:2,301Public BINs:280
Species:365         
Species With Barcodes:288         
          
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Barcode data

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Locations of barcode samples

Collection Sites: world map showing specimen collection locations for Tyrannidae

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Wikipedia

Tyrant flycatcher

The tyrant flycatchers (Tyrannidae) are a clade of passerine birds which occur throughout North and South America. They are considered the largest family of birds on Earth, with more than 400 species. They are the most diverse avian family in every country in the Americas, except for the United States and Canada. As could be expected from a family this large, the members vary greatly in shape, patterns, size and colours. Some tyrant flycatchers superficially resemble the Old World flycatchers which they are named after but are not related to. They are members of suborder Tyranni (suboscines), which do not have the sophisticated vocal capabilities of most other songbirds.[1]

Most, but not all, species are rather plain, with various hues of brown, gray and white commonplace. Obvious exceptions include the bright red vermilion flycatcher, blue, black, white and yellow many-colored rush-tyrant and some species of tody flycathers or tyrants, which are often yellow, black, white and/or rufous, from the Todirostrum, Hemitriccus and Poecilotriccus genera. Several species have bright yellow underparts, from the ornate flycatcher to the great kiskadee. Some species have erectile crests. The crest is taken to the extreme in the royal flycatcher, which is plain but for a large black-spotted, red-and-blue crest which it fans out like a peafowl tail when excited. Several of the large genera (i.e. Elaenia, Myiarchus or Empidonax) are quite difficult to tell apart in the field due to similar plumage and some are best distinguished by their voices. Behaviorally they can vary from species such as spadebills which are tiny, shy and live in dense forest interiors to kingbirds, which are relatively large, bold, inquisitive and often inhabit open areas near human habitations. As the name implies, a great majority of tyrant flycatchers are entirely insectivorous (though do not necessarily specialized in flies). Tyrant flycatchers are largely opportunistic feeders and often catch any flying or arboreal insect they encounter. However, food can vary greatly and some (like the large great kiskadee) will eat fruit or small vertebrates (e.g. small frogs). In North America, most species are associated with a "sallying" feeding style, where they fly up to catch an insect directly from their perch and then immediately return to the same perch. Most tropical species however do not feed in this fashion and several types prefer to glean insects from leaves and barks. Tropical species are sometimes found in mixed-species foraging flocks, where various types of passerines and other smallish birds are found feeding in proximity.

The smallest family members are the closely related short-tailed pygmy tyrant and black-capped pygmy tyrant (the first species usually being considered marginally smaller). With a total length of a mere 6.5-6.8 cm (2.5-2.7 in) and a weight of 4-5 grams, they are the smallest passerines on earth. The minuscule size and very short tail of these flycatchers often makes them lends them a resemblance to a tiny ball or insect. The largest tyrant flycatcher is the great shrike-tyrant at 29 cm (11.5 in) and 99.2 grams (3.5 oz). A few species such as the streamer-tailed tyrant, scissor-tailed flycatcher and fork-tailed flycatcher have a larger total length (up to 41 cm/16 in), but this is mainly due to their extremely long tails. In fact, the fork-tailed flycatcher has relatively the longest tail feathers of any known bird.

A number of species previously included in this family are now placed in the family Tityridae (see Systematics). Sibley and Alquist in their 1990 bird taxonomy had the genera Mionectes, Leptopogon, Pseudotriccus, Poecilotriccus, Taenotriccus, Hemitriccus, Todirostrum and Corythopsis as a separate family Pipromorphidae,[2] but although it is still thought that these genera are basal to most of the family, they are not each other’s closest relatives.[2]

Habitat and distribution[edit]

Species richness of Tyrannidae, when compared to habitat, is highly variable, although most every land habitat in the Americas has at least some number of these birds. The habitats of tropical lowland evergreen forest and montane evergreen forest have the highest single site species diversity while many habitats including rivers, palm forest, white sand forest, tropical deciduous forest edge, southern temperate forest, southern temperate forest edge, semi-humid/humid montane scrub, and northern temperate grassland have the lowest single species diversity. The variation between the highest and the lowest is extreme; ninety species can be found in the tropical lowland evergreen forests while the number of species that can be found in the habitats listed above typically are in the single digits. This may be due in part to the fewer niches found in certain areas and therefore fewer places for the species to occupy.

Tyrannidae specialization among habitat is very strong in tropical lowland evergreen forests and montane evergreen forests. These habitat types therefore display the greatest specialization. The counts differ by three species (tropical lowland evergreen forests have 49 endemic species and montane evergreen forests have 46 endemic species). It can be assumed that they both have similar levels of specialization.

Regionally, the Atlantic Forest has the highest species richness with the Chocó following closely behind.

Status and conservation[edit]

The northern beardless tyrannulet (Camptostoma imberbe) and the rose-throated becard (Pachyramphus aglaiae) are protected under the Migratory Bird Treaty Act of 1918.[1]. Both these species are common south of the US border. The situation for a number of other species from South and Central America is far more problematic. In 2007, BirdLife International (and consequently IUCN) considered two species, the Minas Gerais tyrannulet and Kaempfer's tody-tyrant critically endangered. Both are endemic to Brazil. Additional, 7 species were considered endangered and 18 species vulnerable.[3]

Systematics[edit]

There are about 400 species in 97 genera. A full list, sortable by common and binomial names is at list of tyrant flycatchers. Species in the genera Tityra, Pachyramphus, Laniocera and Xenopsaris were formerly placed in this family, but evidence suggested they belong in their own family, the Tityridae,[4] where they are now placed by SACC.

The great shrike-tyrant (Agriornis lividus) is the largest species of tyrant flycatcher.

References[edit]

  1. ^ del Hoyo, J. Elliott, A. & Christie, D. (editors). (2004) Handbook of the Birds of the World. Volume 9: Cotingas to Pipits and Wagtails. Lynx Edicions. ISBN 84-87334-69-5
  2. ^ a b Rheindt, Frank E., Norman, Janette A. and Christidis, Les; “Phylogenetic relationships of tyrant-flycatchers (Aves: Tyrannidae), with an emphasis on the elaeniine assemblage” in Molecular Phylogenetics and Evolution, September 14, 2007
  3. ^ BirdLife International (2007). Species factsheets. Accessed 12 December 2007 available online
  4. ^ Adopt the Family Tityridae - South American Classification Committee (2007)
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