Pterophylla camellifolia
In 3 days ~10% in a week ~30%
Pterophylla camellifolia, the common true katydid, is a common North American insect. It can be found in southeastern Canada, through the eastern United States from Maine to Florida. P. camellifolia belongs to the family Tettigoniidae (katydids). Within the Tettigoniidae, it belongs to the subfamily Pseudophyllinae (true katydids). Other common names include northern true katydid and rough-winged katydid.
The loud, rasping, three-pulsed song, rendered "ka-ty-did", of the male of the nominate northern subspecies is the source of the vernacular name "katydid” as applied to any tettigoniid. It is a nearly flightless species that, in contrast with other katydids, often walks, runs, or hops rather than leaping or flying. It lives in the canopy of deciduous trees, where it feeds on the foliage. It can reach up to 50 mm (2 in) in length.
The singing rate is temperature dependent. Four populations of this species can be distinguished by song characteristics: The two-, three-, or four-pulsed song of northern populations, as described above; The faster song with more pulses per phrase, often heard in large, synchronized choruses common to the Southeastern populations;
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| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Shenandoah National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Philadelphia | 🇺🇸 United States | |
| 2 | Washington | 🇺🇸 United States | |
| 3 | New York City | 🇺🇸 United States | |
| 4 | Boston | 🇺🇸 United States | |
| 5 | Chicago | 🇺🇸 United States | |
| 6 | Dallas | 🇺🇸 United States | |
| 7 | Houston | 🇺🇸 United States | |
| 8 | Minneapolis [Saint Paul] | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Common True Katydid sighting in Philadelphia on a given day, based on 30 verified sightings from GBIF citizen-science data. It is the 183rd most-seen of the 632 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
July to October
In those months about 10% of wildlife watchers report a Common True Katydid in Philadelphia on a given day, against under 5% in November to June, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Common True Katydid sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is seen both by day and at night.
Yes
Of the 8 cities where we can rate Common True Katydid sightings, Philadelphia has the highest daily chance: under 5%. Next come Washington (United States, under 5%) and New York City (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Common True Katydid is recorded against all the insects logged in Philadelphia (30 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.
