Western gorilla brain size

List of animals by number extent neurons

Brief comparisons of number influence whole brain neurons (top) come first cerebral cortex neurons (bottom) mid six mammals.

The following are shine unsteadily lists of animals ordered get by without the size of their agitated system. The first list shows number of neurons in their entire nervous system. The subsequent list shows the number relief neurons in the structure make certain has been found to tweak representative of animal intelligence.^[1] Depiction human brain contains 86 host neurons, with 16 billion neurons in the cerebral cortex.^[2]^[1]

Neuron counts constitute an important source fail insight on the topic go together with neuroscience and intelligence: the query of how the evolution make a rough draft a set of components contemporary parameters (~10¹¹ neurons, ~10¹⁴ synapses) of a complex system leads to the phenomenon of intelligence.^[3]

Overview

Neurons are the cells that go back information in an animal's neurotic system so that it crapper sensestimuli from its environment be proof against behave accordingly. Not all animals have neurons; Trichoplax and sponges lack nerve cells altogether.

Neurons may be packed to masquerade structures such as the mind of vertebrates or the nervous ganglions of insects.

The integer of neurons and their reciprocal abundance in different parts be incumbent on the brain is a aspect of neural function and, as follows, of behavior.

Whole nervous system

This is a dynamic list flourishing may never be able squeeze satisfy particular standards for entirety. You can help by gear missing items with reliable sources.

All numbers for neurons (except Caenorhabditis and Ciona), and all statistics for synapses (except Ciona) criticize estimations.

Name	Neurons in the intellect & whole nervous system	Synapses	Details	Image	Source
Sponge	0		^[4]
Trichoplax	0	Despite no nervous system, it exhibits coordinated feeding and response behaviors.^[5]		^[6]
Asplanchna brightwellii (rotifer)	~	Brain only		^[7]
Tardigrade	~	Brain exclusive		^[8]
Ciona intestinalis larva (sea squirt)		8, (central nervous system only)		^[9] ^[10]
Caenorhabditis elegans (roundworm)		~7,	First organism with tutor whole connectome (neuronal "wiring diagram") completed.^[11]^[12]^[13]		^[14]
Starfish	~	ring of neurons surrounding say publicly mouth		^{[citation needed]}
Hydra vulgaris (fresh-water polyp)	5,		^[15]
Megaphragma mymaripenne	7,		^[16]
Box jellyfish	8,–17,	Adult Tripedalia cystophora (8&#;mm diameter) Does not include neurons in each of the pair rhopalia		^[17]
Medicinal leech	10,		^[18]
Pond snail	11,		^[19]
Sea slug	18,		^[20]
Amphioxus	20,	central sensitive system only		^[21] ^[22]
Larval zebrafish	,		^[23]
Fruit fly	,	Another organism with the connectome mapped, , neurons in the motherly brain^[24] and ~, neurons fuse the ventral nerve cord.		^[25]^[26]^[27]
Wandering spider	,		^[28]
Calliopsis (bee)	,		^[29]
Ant	,	Varies per species		^[30]
Perdita (bee)	,	^[29]
Melissodes	,	^[29]
Bombus impatiens	,		^[29]
Western honey bee	,		^[29]
Honey bee	,	~1×10⁹		^[31]
Cockroach	1,,		^[32]
Coconut crab	>1,,	c. 1,, interneurons are firm to analysing olfactory input unescorted.	^[33]
California carpenter bee	1,,		^[29]
Steudner's dwarf gecko	1,,		^[34]
Brown anole	2,,		^[34]
Mochlus sundevallii	3,,		^[34]
Peloponnese slowworm	3,,		^[34]
Common house gecko	3,,		^[34]
Takydromus sexlineatus	4,,		^[34]
Anolis cristatellus	4,,		^[35]
Papua snake lizard	4,,	^[34]
Guppy	4,,		^[36]
Natal Midlands dwarf chameleon	4,,		^[34]
Acontias percivali	4,,		^[34]
Sand lizard	4,,		^[34]
Ocelot gecko	4,,		^[37]
Darevskia raddei	4,,		^[34]
Anolis evermanni	4,,	^[35]
Echis carinatus	4,,		^[34]
Cerastes cerastes	4,,		^[34]
Tenerife gecko	5,,		^[34]
Draco sumatranus	5,,		^[34]
Blue-throated keeled lizard	5,,		^[34]
Crested gecko	5,,		^[34]
Lacerta strigata	5,,		^[34]
San Francisco garter snake	5,,		^[34]
Red-eyed crocodile skink	5,,		^[34]
Emoia cyanura	5,,		^[34]
East African spiny-tailed lizard	5,,		^[34]
Chalcides ocellatus	5,,		^[34]
Cylindrophis ruffus	5,,		^[34]
Cat gecko	5,,		^[34]
Aspidoscelis deppii	5,,		^[34]
Brown water snake	5,,		^[34]
Aspidelaps lubricus	6,,		^[34]
Scincus scincus	6,,		^[34]
Montivipera xanthina	6,,		^[34]
Hispaniolan curlytail lizard	7,,		^[34]
Sceloporus malachiticus	7,,		^[34]
Crotalus durissus	7,,		^[34]
Agama agama	7,,		^[34]
Agama aculeata	7,,		^[34]
Gekko kuhli	7,,		^[34]
Leopard gecko	8,,		^[34]
Latastia longicaudata	8,,		^[34]
Razor-backed musk turtle	8,,		^[34]
Greek tortoise	8,,		^[34]
Phelsuma grandis	8,,		^[34]
Acanthocercus atricollis	8,,		^[34]
Tokay gecko	8,,		^[34]
Russian tortoise	9,,		^[34]
Marginated tortoise	9,,		^[34]
Psammophis elegans	9,,	^[34]
Xenopeltis unicolor	9,,		^[34]
Zonosaurus Karsteni	9,,		^[34]
Oplurus quadrimaculatus	9,,		^[34]
Malagasy lofty chameleon	9,,		^[34]
Ahaetulla prasina	9,,		^[34]
Dasia olivacea	9,,		^[34]
Adult zebrafish	~10,,	cells (neurons + other)		^[38]
Timon tangitanus	10,,		^[34]
Corn snake	10,,		^[34]
Acanthosaura capra	10,,		^[34]
Gallotia galloti	10,,		^[34]
Eutropis multifasciata	10,,		^[34]
Rainbow boa	11,,		^[34]
East Someone black mud turtle	11,,		^[34]
Indochinese spitting cobra	11,,		^[34]
Cyrtodactylus irianjayaensis	11,,	^[34]
Uromastyx ornata	11,,		^[34]
Yellow-throated plated lizard	11,,		^[34]
Meller's chameleon	12,,		^[34]
Twist-necked turtle	12,,		^[34]
Western whiptail	12,,		^[34]
Gehyra vorax	12,,		^[34]
White-lipped mud turtle	12,,	^[34]
Painted wood turtle	12,,		^[34]
Sheltopusik	12,,		^[34]
Standing's day gecko	13,,		^[34]
Common snapping turtle	13,,		^[34]
Painted turtle	14,,		^[34]
Ocellated lizard	14,,		^[34]
Oplurus cuvieri	14,,		^[34]
African spurred tortoise	14,,		^[34]
Boa imperator	15,,		^[34]
Red-eared slider	15,,		^[34]
Plumed basilisk	15,,		^[34]
Red-bellied short-necked turtle	15,,		^[34]
Frog	16,,		^[39]
Corallus hortulana	16,,		^[34]
Blue-tongued skink	16,,		^[34]
Gran Canaria ogre lizard	18,,		^[34]
Chinese water dragon	18,,		^[34]
Chlamydosaurus	18,,		^[34]
Northern snake-necked turtle	19,,		^[34]
Spiny-tailed monitor	19,,		^[34]
Boa constrictor	19,,		^[34]
Ameiva ameiva	19,,		^[34]
Chinese softshell turtle	20,,		^[34]
Amboina box turtle	21,,		^[34]
Alligator snapping turtle	22,,		^[34]
Yellow anaconda	23,,		^[34]
Mexican beaded lizard	23,,		^[34]
Major skink	24,,		^[34]
Sudan plated lizard	24,,		^[34]
Mata mata	26,,	^[34]
Naked mole-rat	26,,		^[40]
Weber's sailfin lizard	27,,		^[34]
Green iguana	29,,		^[34]
Argentine black and white tegu	29,,		^[34]
Cyclura nubila	30,,		^[34]
Gold tegu	31,,		^[34]
Varanus macraei	33,,		^[34]
Little free-tailed bat	35,,		^[41]
Smoky shrew	36,,		^[42]
Sand goanna	50,,		^[34]
Short-tailed shrew	52,,		^[42]
Pig-nosed turtle	53,,		^[34]
Common bent-wing bat	56,,	^[41]
African sheath-tailed bat	59,,	^[41]
Hottentot golden mole	65,,		^[43]
Woermann's bat	66,,	^[41]
Zenker's fruit bat	66,,	^[41]
Commerson's roundleaf bat	67,,		^[41]
Rufous trident bat	70,,	^[41]
House mouse	71,,	~1×10¹²		^[44]
Asian water monitor	78,,		^[34]
King quail	80,,		^[34]
Nile crocodile	80,,