Pseudolynchia canariensis
In 3 days ~10% in a week ~20%
Pseudolynchia canariensis, the pigeon louse fly or pigeon fly, is a species of biting fly in the family of louse flies, Hippoboscidae. Pseudolynchia canariensis are species-specific (Columbidae) obligate ectoparasites potentially found in many parts of world where domestic pigeons are kept. Known from wild or feral hosts in continental Africa, the Mediterranean Sub-region, Afghanistan, India, Bangladesh, Nepal, Thailand, Taiwan, Ryukyu Islands, the Philippines, Malaya, and Indonesia, as well as North America and South America in warmer latitudes.
In 1931, G. Robert Coatney conducted an experiment to determine if pigeon louse flies would bite humans and survive on human blood and he found they could not. The only wild hosts are pigeons and doves (Columbidae). In domestic settings they have been recorded from 33 genera, 13 families and 8 orders of birds.
Pseudolynchia canariensis is the definitive host (sexual reproduction takes place in the insect vector) for the protozoan Haemoproteus columbae or pigeon malaria and transmits this parasite to Columbiformes. This parasite can be fatal to young rock pigeons in extremely infected birds... Wikipedia →
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Pigeon Louse Fly sighting in Hong Kong on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 778th most-seen of the 1125 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.
December
In that month about 10% of wildlife watchers report a Pigeon Louse Fly in Hong Kong on a given day, against under 5% in January to November, the lowest months. That is one of Hong Kong's driest months, with about 25 mm of rain against 280 mm in June.
11th of 16
Of the 16 cities where we can rate Pigeon Louse Fly sightings, Hong Kong ranks 11th at under 5%. The best odds are in Valencia (Spain, about 10%), Tel Aviv (Israel, about 10%) and Bucharest (Romania, about 10%).
Same order: Diptera
The closest relatives of the Pigeon Louse Fly that you can see in Hong Kong (order Diptera, Flies) are Ptecticus aurifer (about 10%), Yellow-Shouldered Hover Fly (about 10%) and Microstylum dux (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Pigeon Louse Fly is recorded against all the insects logged in Hong Kong (9 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.
