Pseudolynchia canariensis

(Macquart, 1839)

pigeon louse fly, pigeon fly

Pseudolynchia canariensis is an obligate ectoparasitic louse fly in the Hippoboscidae that specializes on pigeons and doves (Columbidae). It is a significant of Haemoproteus columbae, the causative agent of pigeon , serving as the definitive where of the occurs. The exhibits adenotrophic viviparity, producing one at a time that is deposited in the host's nest or roosting site. Both sexes feed exclusively on blood. The fly has been documented in numerous regions worldwide, particularly where domestic pigeons are kept, and shows limited ability to survive on human blood.

Pseudolynchia canariensis by (c) Roman, some rights reserved (CC BY), uploaded by Roman. Used under a CC-BY license.

Pseudolynchia canariensis by no rights reserved, uploaded by Marino Linić. Used under a CC0 license.

Pronunciation

How to pronounce Pseudolynchia canariensis: //ˌsjʊːdəˈlɪnkiə ˌkænəˈriːɛnsiːs//

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Identification

Dorsoventrally flattened body adapted for moving between feathers; this flattened shape distinguishes Hippoboscidae from most other Diptera. are winged and capable of , unlike some flightless hippoboscid . Tough makes the fly to crushing. Specific identification requires examination of morphological characters typical of the Pseudolynchia.

Images

Habitat

Found in close association with birds, particularly in nests and roosting sites where pupae are deposited. Occurs in domestic, , and wild pigeon across varied environments including urban areas, agricultural settings, and natural where columbiform birds are present.

Distribution

Documented from continental Africa, the Mediterranean region, Afghanistan, India, Bangladesh, Nepal, Thailand, Taiwan, Ryukyu Islands, Philippines, Malaya, Indonesia, North America (warmer latitudes), South America (warmer latitudes), Brazil (multiple states), Norway, Madeira Island (Portugal), and Hawaii. Distribution closely follows that of domestic pigeon keeping and Columba livia .

Diet

Both sexes feed exclusively on blood of columbiform birds.

Host Associations

Columbidae (pigeons and doves) - obligate Only wild ; includes both and domestic of multiple . In laboratory conditions has been recorded from 33 genera, 13 , and 8 orders of birds, though natural host range is more restricted.
Haemoproteus columbae - (definitive ) of the protozoan occurs in the fly; transmitted to columbiform . Can be fatal to young rock pigeons in heavily infected birds, though often benign.
"Candidatus" Arsenophonus arthropodicus - (intracellular secondary endosymbiont)Bacterial endosymbiont isolated and cultured from this fly .
Myialges anchora - (hyperparasitic mite)Mites commonly infest pigeon flies.
Ischnoceran lice - phoretic carrier use the fly for transport between bird ; do not feed on the fly.

Life Cycle

Adenotrophic viviparity: female produces one offspring at a time. A single hatches in the female's uterus; larva develops internally, feeding from milk glands, and is retained until fully grown. Female deposits a (late-stage larva enclosed in a shell that hardens into a true pupa) in the 's nest or roosting site. At 30°C, are produced at regular 24-hour intervals, averaging 8.8 puparia per female. Optimum temperature for colony maintenance is 26.6–30.0°C; temperatures of 13°C and 37°C are lethal to pupae. Puparial deposition and occur only during . Humidity does not markedly affect pupal development.

Behavior

Strongly -specific in natural settings despite laboratory observations suggesting broader host suitability. When dislodged from host, quickly returns to same or nearest host individual. Rarely spends time off host except during . Both sexes blood-feed, unlike many dipteran where only females feed on blood.

Ecological Role

for Haemoproteus columbae, contributing to transmission dynamics in columbiform . Serves as phoretic transport for ischnoceran between bird . Hosts hyperparasitic mites and bacterial endosymbionts, contributing to micro- complexity.

Human Relevance

Significant pest of domestic pigeons and doves. Bites humans when no alternative is available, causing itchy reactions, but cannot survive or reproduce on human blood alone. Of concern in pigeon keeping and racing industries due to transmission. Experimental studies in 1931 demonstrated inability to establish on human hosts.

Similar Taxa

Crataerina pallidaAnother hippoboscid fly, but flightless and specialized on swifts (Apodidae); P. canariensis retains capability and specializes on Columbidae.
Olfersia spiniferaHippoboscid fly parasitizing frigate birds; demonstrates similar for but on different group.
Sheep keds (Melophagus ovinus)Hippoboscid fly parasitizing mammals rather than birds; -level similarity in flattened body form and adenotrophic viviparity but different class.