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The tanager family of birds is a big confusing nest of birds. It used to be one big family and by that I mean roughly 4% of the world's birds were in the family. It's too complicated to describe, here, so in this gallery, you'll find birds that have the word tanager in their name even though the Pirangas, Chlorothraupis and Habia are now cardinals.

Tanager Wiki
The tanagers comprise the bird family Thraupidae, in the order Passeriformes. The Thraupidae are the second-largest family of birds and represent about 4% of all avian species and 12% of the Neotropical birds. Traditionally, about 240 species of tanagers have been described, but the taxonomic treatment of this family's members is currently in a state of flux. As more of these birds are studied using modern molecular techniques, some genera are expected to be relocated elsewhere. Already, species in the genera Euphonia and Chlorophonia, which were once considered part of the tanager family, are now treated as members of Fringillidae, in their own subfamily (Euphoniinae). Likewise, the genera Piranga (which includes the Scarlet Tanager, Summer Tanager, and Western Tanager), Chlorothraupis, and Habia (Ant-tanagers) appear to be members of the cardinal family and have been reassigned to that family by the American Ornithologists' Union.

Tanagers are small to medium-sized birds. Both sexes are usually the same size and weight. Tanagers are often brightly colored, but some species are black and white. Birds in their first year are often duller or a different color altogether. Males are typically more brightly colored than females. Most tanagers have short, rounded wings. The shape of the bill seems to be linked to the species' foraging habits.

Species In my tanager photography gallery you will find:
Black-capped Tanager, Tangara heinei
Bay-headed Tanager, Tangara gyrola
Blue-grey Tanager, Thraupis episcopus
Cherrie's Tanager, Ramphocelus costaricensis

Crimson-backed Tanager, Ramphocelus dimidiatus
Dusky-faced Tanager, Mitrospingus cassinii
Flame-rumped Tanager, Ramphocelus flammigerus
Golden-hooded Tanager, Tangara larvata
Gray-headed Tanager, Eucometis penicillata
Hepatic Tanager, Piranga flava
Palm Tanager, Thraupis palmarum
Passerini's Tanager, Ramphocelus passerinii

Plain-coloured Tanager, Tangara inornata
Red-throated Ant-tanager, Habia fuscicauda
Rufous-bellied Mountain Tanager, Pseudosaltator rufventris.
Scarlett Tanager, Piranga olivacea

Scarlet-thighed Dacnis, Dacnis venusta
Silver-throated Tanager, Tangara icterocephala
Summer Tanager, Pirangra rubra

Tawny-crested Tanager, Tachyphonus delatrii
Wedge-tailed Grass Finch, Emberizoides herbicola

Collective Noun
The collective noun for a group of tanagers is a "season". Which is rather lame, in my not so humble opinion. I think that "splash" is a much more interesting and complimentary name for the exotic feathered friends, the tanagers.

I lead workshops around the world and whether it was intended or not, I always find time to make a bird photo or two. Check out Wildlife Workshops and see if I have a photography workshop that fits your eye.
Black-capped Tanager (Male) in EcuadorBlack-capped Tanager, (Female) in EcuadorBlack-capped Tanager, (Female) in EcuadorBlue-grey Tanager, Thraupis episcopusBlue-grey Tanager, Thraupis episcopusBlue-grey Tanager, Thraupis episcopusBlue-grey Tanager, Thraupis episcopusBlue-grey Tanager, Thraupis episcopusBlue-grey Tanager, Thraupis episcopusBay-headed Tanager with nesting material in PanamaCrimson-backed Tanager in a rhododendron. Nicknamed Sangre de Toro, Blood of the Bull.Male Crimson-backed Tanager in PanamaCrimson-backed Tanager (Male) in rainy Panama.Crimson-backed Tanager (Female) in PanamaMale Cherrie's Tanager - Costa RicaFemale Cherrie's Tanager - Costa RicaMale Cherrie's Tanager - Costa RicaFemale Cherrie's Tanager - Costa RicaFemale Cherrie's Tanager - Costa RicaDusky-faced Tanager in Panama