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 Are Crows Cawing at My House?
Seven reasons crows caw at your house, from predator mobbing to territorial calling, with a cadence diagnostic table, the Marzluff face-recognition research explained, and guidance on when to act and when to leave them alone.
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.
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.
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.
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.
American Crow (Corvus brachyrhynchos): Identification & Roost Behaviour
Field profile of Corvus brachyrhynchos: American Crow identification, winter roosts, Fish Crow confusion, and human face recognition.
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.
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.