itis_search(..., proxy = NULL, callopts = list())

## Not run: 
itis_search(q = "tsn:182662")

# get all orders within class Aves (birds)
z <- itis_search(q = "rank:Class AND nameWOInd:Aves")
hierarchy_down(z$tsn)

# get taxa "downstream" from a target taxon
## taxize and taxizedb packages have downstream() fxns, but
## you can do a similar thing here by iteratively drilling down
## the taxonomic hierarchy
## here, we get families within Aves
library(data.table)
aves <- itis_search(q = "rank:Class AND nameWOInd:Aves")
aves_orders <- hierarchy_down(aves$tsn)
aves_families <- lapply(aves_orders$tsn, hierarchy_down)
rbindlist(aves_families)

# the tila operator
itis_search(q = "nameWOInd:Liquidamber\\ styraciflua~0.4")

# matches only monomials
itis_search(q = "nameWOInd:/[A-Za-z0-9]*[ ]{0,0}*/")

# matches only binomials
itis_search(q = "nameWOInd:/[A-Za-z0-9]*[ ]{1,1}[A-Za-z0-9]*/")

# matches only trinomials
itis_search(q = "nameWOInd:/[A-Za-z0-9]*[ ]{1,1}[A-Za-z0-9]*[ ]{1,1}[A-Za-z0-9]*/")

# matches binomials or trinomials
itis_search(q = "nameWOInd:/[A-Za-z0-9]*[ ]{1,1}[A-Za-z0-9]*[ ]{0,1}[A-Za-z0-9]*/")

itis_search(q = "nameWOInd:Poa\\ annua")

# pagination
itis_search(q = "nameWOInd:/[A-Za-z0-9]*[ ]{0,0}*/", rows = 2)
itis_search(q = "nameWOInd:/[A-Za-z0-9]*[ ]{0,0}*/", rows = 200)

# select fields to return
itis_search(q = "nameWOInd:/[A-Za-z0-9]*[ ]{0,0}*/",
   fl = c('nameWInd', 'tsn'))

## End(Not run)