Animalia > Chordata > Aves > Passeriformes > Corvidae > Aphelocoma > Aphelocoma insularisAphelocoma insularis (Island Scrub-Jay; Island Scrub Jay)Synonyms: Aphelocoma coerulescens insularis The island scrub jay (Aphelocoma insularis) also island jay or Santa Cruz jay is a bird in the scrub jay genus, Aphelocoma, which is endemic to Santa Cruz Island off the coast of Southern California. Of the over 500 breeding bird species in the continental U.S. and Canada, it is the only insular endemic landbird species. The island scrub jay (ISSJ) is closely related to the California scrub jay – the coastal population found on the adjacent mainland – but differs in being larger, more brightly colored, and having a markedly stouter bill. The large bill size is related to its diet, incorporating the thick-shelled acorns of the island oak (Quercus tomentella). They will bury, or cache, the acorns in the fall and may eat them months later. They also eat insects, spiders, snakes, lizards, mice |
Uniqueness Scale: Similiar (0) Unique (100) Uniqueness & Vulnerability Scale: Similiar & Secure (0) Unique & Vulnerable (100) ED Score: 4.99667 EDGE Score: 3.1775 |
| Adult Weight [1] | 104 grams | | Birth Weight [3] | 7.1 grams | | Female Weight [6] | 109 grams | | Male Weight [6] | 123 grams | | Weight Dimorphism [6] | 12.8 % |  | | Breeding Habitat [2] | Coastal islands, Aridlands | | Wintering Geography [2] | Non-migrartory | | Wintering Habitat [2] | Islands | | | Diet [4] | Carnivore (Invertebrates), Carnivore (Vertebrates), Frugivore, Granivore | | Diet - Ectothermic [4] | 10 % | | Diet - Endothermic [4] | 10 % | | Diet - Fruit [4] | 10 % | | Diet - Invertibrates [4] | 20 % | | Diet - Seeds [4] | 50 % | | Forages - Mid-High [4] | 10 % | | Forages - Understory [4] | 10 % | | Forages - Ground [4] | 80 % | | | Clutch Size [5] | 4 | | Clutches / Year [5] | 1 | | Fledging [1] | 18 days | | Global Population (2017 est.) [2] | 1,700 | | Incubation [5] | 18 days | | Maximum Longevity [5] | 15 years | | Snout to Vent Length [1] | 11 inches (29 cm) | | | Female Maturity [5] | 1 year | | Male Maturity [5] | 1 year |
|
 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 ♦ 5de Magalhaes, J. P., and Costa, J. (2009) A database of vertebrate longevity records and their relation to other life-history traits. Journal of Evolutionary Biology 22(8):1770-1774 ♦ 6Atwood, J. L. 1979. Body weights of the Santa Cruz Island Scrub Jay. North American Bird Bander 4: 148-153. Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 Wildfinder Database |
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
|
