Amphicerus bicaudatus
In 3 days ~10% in a week ~20%
Amphicerus bicaudatus, known generally as the apple twig borer or grape cane borer, is a species of horned powder-post beetle in the family Bostrichidae. It is a pest of cultivated orchard trees as well as grapes and other tree species.
Adults are long and cylindrical, about 6 to 13 millimeters long. Color can range from reddish brown to black. Larvae are white with a brown head and mandibles, about 10 millimeters long. Allen et al., 1991 finds some periodicity and some chaos in its population dynamics while Allen et al., 1993 finds only periodicity and quasiperiodicity. Both examine the interaction of beetle, insecticide, cane removal, and the grapevine host. The 1991 model shows some chaotic solutions while 1993 never does.
Media related to Amphicerus bicaudatus at Wikimedia Commons Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report an Apple Twig Borer sighting in Austin on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 1316th most-seen of the 1624 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report an Apple Twig Borer in Austin on a given day, so our monthly data shows no clear season.
Yes
Of the 2 cities where we can rate Apple Twig Borer sightings, Austin has the highest daily chance: under 5%. Next come Dallas (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Apple Twig Borer is recorded against all the insects logged in Austin (7 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
