Family Reference
Corvids
Crows, ravens, jays, and magpies — the family most likely to recognise you back, and the smartest birds in any garden.
The Complete Corvids Guide: Crows, Ravens, Jays & Magpies
Field reference to Corvidae: crow, raven, jay, and magpie identification, cognition, social behaviour, calls, and common confusions.
Read the guide →Species & Profiles
All articles in this section
Why Corvids Are Intelligent: The Bird Brain Reconsidered
Brain-to-body ratio, tool use, mirror self-recognition, face recognition, and caching deception. The documented abilities that place corvids alongside great apes in cognitive sophistication.
Why Are Crows Attacking Other Birds?
Why American Crows attack other birds: mobbing raptors and owls, nest predation, territorial disputes, and food competition explained. Diagnostic table, ecological impact evidence, and MBTA legal protections included.
Why Are Crows Cawing at My House?
Why crows caw around a house, how to tell mobbing from contact calls, and when the noise points to predators, food, nests, or roosting.
Crow vs Raven: Six Reliable Field Marks
Size, tail shape, voice, throat hackles, flight style, and habitat separate American Crow from Common Raven. Includes Fish Crow and Carrion Crow as additional confusions.
Clark's Nutcracker (Nucifraga columbiana): The Cache Master
Clark's Nutcracker (Nucifraga columbiana), the western-mountain corvid that caches tens of thousands of conifer seeds annually. Field profile covering ID, whitebark pine mutualism, and conservation.
Black-billed Magpie (Pica hudsonia): The American West's Pied Corvid
Field profile of Pica hudsonia, the Black-billed Magpie: pied plumage, long tail, western range, domed nests, carrion feeding, and social behaviour.
Northwestern Crow (Corvus caurinus): The Coastal Pacific Crow
Field profile of Corvus caurinus, the Northwestern Crow: Pacific coastal ecology, taxonomy, voice, shellfish foraging, and its merger with American Crow.
Hooded Crow (Corvus cornix): The Grey-bodied Crow
Field profile of Corvus cornix, the Hooded Crow: grey-and-black identification, northern and eastern range, hybrid zone with Carrion Crow, diet, and breeding.
Eurasian Jackdaw (Coloeus monedula): The Pale-eyed Chimney Corvid
Field profile of Coloeus monedula, the Eurasian Jackdaw: pale eye, voice, chimneys and colonies, pair bonds, diet, and cavity nesting.
Canada Jay (Perisoreus canadensis): The Boreal Cache-builder
Field profile of Perisoreus canadensis, the Canada Jay: boreal range, quiet voice, winter nesting, sticky-saliva food caching, and climate sensitivity.
Florida Scrub-Jay (Aphelocoma coerulescens): Cooperative Breeder of Sand-pine Scrub
Field profile of Aphelocoma coerulescens, the Florida Scrub-Jay: endemic range, cooperative breeding, fire-maintained scrub, ESA status, and diet.
Fish Crow (Corvus ossifragus): Coastal Cousin of the American Crow
Field profile of Corvus ossifragus, the Fish Crow: voice-based identification, coastal and riverine range, nesting, diet, and separation from American Crow.
Eurasian Magpie (Pica pica): Mirror-self-recognition in a European Garden Bird
Field profile of Pica pica, the Eurasian Magpie: identification, voice, Palearctic range, domed nests, diet, and Prior et al. mirror-test work.
Steller's Jay (Cyanocitta stelleri): The Crested Western Jay
Field profile of Cyanocitta stelleri, Steller's Jay: crested structure, voice, western conifer range, camp foraging, caching, nesting, and Blue Jay overlap.
Carrion Crow (Corvus corone): Britain's Default All-black Corvid
Field profile of Corvus corone, the Carrion Crow: all-black identification, voice, western European range, hooded-crow hybrid zone, diet, and breeding.
American Crow (Corvus brachyrhynchos): Identification & Roost Behaviour
Field profile of Corvus brachyrhynchos: American Crow identification, winter roosts, Fish Crow confusion, and human face recognition.
Blue Jay (Cyanocitta cristata): Identification, Voice & Acorn Behaviour
Field profile of Cyanocitta cristata: Blue Jay identification, hawk mimicry, acorn caching, oak dispersal, and feeder behaviour.
Eurasian Jay (Garrulus glandarius): Acorn Cacher of European Woods
Field profile of Garrulus glandarius, the Eurasian Jay: pink-brown plumage, blue wing panel, harsh calls, oak caching, mimicry, and woodland breeding.
Rook (Corvus frugilegus): The Colonial Farmland Corvid
Field profile of Corvus frugilegus, the Rook: bare-faced adults, rookeries, farmland diet, social foraging, voice, and separation from Carrion Crow.
California Scrub-Jay (Aphelocoma californica): The Western Acorn Hoarder
Field profile of Aphelocoma californica, the California Scrub-Jay: identification, oak woodland range, acorn caching, social behaviour, and nesting.
Common Raven (Corvus corax): Identification, Voice & Cognition
Field profile of Corvus corax, the Common Raven: structure, voice, circumpolar range, breeding ecology, carrion use, play, and controlled cognition studies.