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Subspecies is abbreviated as subsp. or ssp. and the singular and plural forms are the same ("the subspecies is" or "the subspecies are"). In zoology , under the International Code of Zoological Nomenclature , the subspecies is the only taxonomic rank below that of species that can receive a name.
A variety of whistling and clicking calls have been described. Slight morphological differences have been observed between subspecies. A shy bird, the white-crowned forktail stays near water, and forages on the edges of rivers and streams for invertebrates. Its breeding season is between March and September, and possibly extends till October ...
For algae, fungi, plants, and their fossils, there is an indeterminate number of infraspecific ranks allowed below the level of species. The secondary ranks below the species rank are variety and forma, and more ranks can be made by using the prefix "sub" to make subspecies, subvariety, subforma. Very rarely even more forms are created, such as ...
Variety is defined in the code as follows: "Variety (varietas) the category in the botanical nomenclatural hierarchy between species and form (forma)". The code acknowledges the other usage as follows: "term used in some national and international legislation for a clearly distinguishable taxon below the rank of species; generally, in ...
Both sexes have a white spot behind the eye. Both sexes also have a forked tail, but the male's is more deeply indented than the female's. The subspecies differ significantly in their plumage. [6] Males of the nominate subspecies have a glittering yellow-green forecrown that transitions through golden yellow to blue on the crown.
These birds are 15 cm long. The adult male exhibits a dark-blue plumage with bright-blue upper-wings. The females and the juveniles are brown. The ultramarine grosbeak is territorial; it doesn't fly in flocks. If a male invades the territory of another, for sure there will be a conflict with some violence.
Until recently, the turquoise-winged parrotlet was considered a subspecies of the cobalt-rumped parrotlet as Forpus xanthopterygius spengeli.However, in 2015 Bocalini and Silveira studied morphological differences between subspecies of cobalt-rumped parrotlets and determined that the turquoise-winged parrotlet was its own species, F. spengeli. [4]
The behavior spreads among the birds by imitation. [10] In captivity some will spontaneously dance to music with a variety of unique moves. [11] These birds are very long-lived, and can live upwards of 70 years in captivity, [12] [13] although they only live to about 20–40 years in the wild.
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