Animalia > Chordata > Aves > Accipitriformes > Accipitridae > Buteo > Buteo nitidus

Buteo nitidus (Grey-lined Hawk)

Synonyms: Asturina cinerea; Asturina nitida; Falco nitidus
Language: Spanish

Wikipedia Abstract

The grey-lined hawk (Buteo nitidus) is a smallish raptor found in open country and forest edges. It is sometimes placed in the genus Asturina as Asturina nitida. The species has been split by the AOU from the grey hawk. The grey-lined hawk is found from southern Costa Rica to Argentina. The grey-lined hawk is 46–61 cm (18–24 in) in length and weighs 475 g (16.8 oz) average. The adult has a pale grey body, the tail is black with three white bands and the legs are orange. It has fine white barring on the upper parts.
View Wikipedia Record: Buteo nitidus


EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 6.64475
EDGE Score: 2.03402


Adult Weight [1]  1.162 lbs (527 g)
Birth Weight [3]  43.2 grams
Female Weight [5]  1.385 lbs (628 g)
Male Weight [5]  429 grams
Weight Dimorphism [5]  46.4 %
Breeding Habitat [2]  Tropical evergreen forests
Wintering Geography [2]  Non-migrartory
Wintering Habitat [2]  Tropical evergreen forests
Diet [4]  Carnivore (Invertebrates), Carnivore (Vertebrates)
Diet - Ectothermic [4]  60 %
Diet - Endothermic [4]  20 %
Diet - Invertibrates [4]  20 %
Forages - Canopy [4]  33 %
Forages - Mid-High [4]  33 %
Forages - Understory [4]  33 %
Clutch Size [7]  2
Fledging [1]  42 days
Incubation [6]  32 days
Mating System [3]  Monogamy
Raptor Research Conservation Priority [8]  75
Snout to Vent Length [1]  16 inches (41 cm)
Wing Span [6]  33 inches (.84 m)
Female Maturity [1]  1 year 12 months


Protected Areas

Biodiversity Hotspots


Parasitized by 
Platynosomum costaricense[9]
Platynosomum reficiens <Unverified Name>[9]
Urorygma nanodes <Unverified Name>[9]

Range Map

External References


Play / PauseVolume
Provided by Center for Biological Diversity via Myxer Author: ASU-Ask A Biologist


Attributes / relations provided by
1Nathan 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
2Partners in Flight Avian Conservation Assessment Database, version 2017. Accessed on January 2018.
3Terje Lislevand, Jordi Figuerola, and Tamás Székely. 2007. Avian body sizes in relation to fecundity, mating system, display behavior, and resource sharing. Ecology 88:1605
4Hamish 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
5Bibles, BD, RL Glinski, and RR Johnson. 2002. Gray Hawk (Asturina nitida), no. 652. In A. Poole and F. Gill [EDS.], The birds of North America. Birds of North America, Inc., Philadelphia.
6del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
7Jetz 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
8Buechley 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.
9Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
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
Audio software provided by SoundManager 2
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset accessed via on 2023-06-13; License: CC BY 4.0