Animalia > Chordata > Aves > Strigiformes > Strigidae > Asio > Asio stygius

Asio stygius (Stygian Owl)

Synonyms: Nyctalops stygius
Language: Spanish

Wikipedia Abstract

The stygian owl (Asio stygius) is a medium-sized dusky colored owl. It has yellow eyes, a black beak, a dark blackish facial disk, and white eyebrows. Its underparts are a dingy buff color with dark brown barring and streaks. The upperparts are reverse, buff barring and streaks on a dark background.This owl occupies a variety of deciduous and evergreen forests, and open areas with patchy forest. It lives from sea level to 3,100 metres (10,200 ft) above.This species takes in a variety of prey including birds, small mammals, reptiles, amphibians, crustaceans, and insects. All of its hunting is done at night.
View Wikipedia Record: Asio stygius

Infraspecies

Asio stygius barberoi
Asio stygius lambi
Asio stygius noctipetens
Asio stygius robustus
Asio stygius siguapa
Asio stygius stygius

EDGE Analysis

Uniqueness Scale: Similiar (0) 
3
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
22
 Unique & Vulnerable (100)
ED Score: 7.92989
EDGE Score: 2.1894
Learn more at EDGE of Existence programme

Attributes

Adult Weight [1]  1.246 lbs (565 g)
Breeding Habitat [2]  Mexican pine-oak forests, Tropical cloud forests, Montane evergreen forests
Wintering Geography [2]  Non-migrartory
Wintering Habitat [2]  Mexican pine-oak forests, Tropical cloud forests
Diet [3]  Carnivore (Invertebrates), Carnivore (Vertebrates)
Diet - Ectothermic [3]  10 %
Diet - Endothermic [3]  80 %
Diet - Invertibrates [3]  10 %
Forages - Mid-High [3]  20 %
Forages - Understory [3]  10 %
Forages - Ground [3]  60 %
Forages - Water Surface [3]  10 %
Clutch Size [4]  2
Nocturnal [3]  Yes
Raptor Research Conservation Priority [5]  64
Snout to Vent Length [6]  17 inches (42 cm)

Ecoregions

Protected Areas

Biodiversity Hotspots

Name Location Endemic Species Website
Atlantic Forest Argentina, Brazil, Paraguay, Uruguay No
Caribbean Islands Anguilla, Antigua and Barbuda, Aruba, Bahamas, Barbados, Cayman Islands, Cuba, Dominica, Dominican Republic, Haiti, Grenada, Guadeloupe, Jamaica, Martinique, Montserrat, Netherlands Antilles, Puerto Rico, Saint Kitts and Nevis, Saint Lucia, Saint Vincent And The Grenadines, Trinidad and Tobago, Turks And Caicos Islands, Virgin Islands - British, Virgin Islands - U.S. No
Cerrado Brazil No
Mesoamerica Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama No
Tropical Andes Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela No

Prey / Diet

Nyctinomops laticaudatus (broad-eared bat)[7]
Phyllonycteris poeyi (Cuban flower bat)[8]

Prey / Diet Overlap

Competing SpeciesCommon Prey Count
Chilabothrus angulifer (Cuban Boa)1
Cubophis cantherigerus (Cuban Racer)1
Tyto alba (Barn Owl)2

Range Map

External References

Citations

Attributes / relations provided by
♦ 1Arendt, W.J.; Faaborg, J.; Wallace, G.E.; Garrido, O.H. 2004. Biometrics of birds throughout the Greater Caribbean basin. Proceedings of the Western Foundation of Vertebrate Zoology. 8(1): 1-33.
♦ 2Partners in Flight Avian Conservation Assessment Database, version 2017. Accessed on January 2018.
♦ 3Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014. EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
♦ 4Jetz W, Sekercioglu CH, Böhning-Gaese K (2008) The Worldwide Variation in Avian Clutch Size across Species and Space PLoS Biol 6(12): e303. doi:10.1371/journal.pbio.0060303
♦ 5Buechley ER, Santangeli A, Girardello M, et al. Global raptor research and conservation priorities: Tropical raptors fall prey to knowledge gaps. Divers Distrib. 2019;25:856–869. https://doi.org/10.1111/ddi.12901
♦ 6Nathan P. Myhrvold, Elita Baldridge, Benjamin Chan, Dhileep Sivam, Daniel L. Freeman, and S. K. Morgan Ernest. 2015. An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96:3109
♦ 7Nyctinomops laticaudatus, Rafael Avila-Flores, José Juan Flores-MartÍnez, and Jorge Ortega, MAMMALIAN SPECIES No. 697, pp. 1–6 (2002)
♦ 8Phyllonycteris poeyi (Chiroptera: Phyllostomidae), CARLOS A. MANCINA, MAMMALIAN SPECIES 42(852):41–48 (2010)
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 Wildfinder Database
Biodiversity Hotspots provided by Critical Ecosystem Partnership Fund
Abstract provided by DBpedia licensed under a Creative Commons License
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0