This directed network contains the peck order of 32 white Leghorn hens (Gallus gallus domesticus) observed in 1946. A node represents a hen and an edge represents dominance of the left hen over the right hen.


Internal namemoreno_hens
Data sourcehttp://moreno.ss.uci.edu/data.html#hens
AvailabilityDataset is available for download
Consistency checkDataset passed all tests
Animal network
Node meaningHen
Edge meaningDominance
Network formatUnipartite, directed
Edge typeUnweighted, no multiple edges
ReciprocalDoes not contain reciprocal edges
Directed cyclesContains directed cycles
LoopsDoes not contain loops
Skew-symmetry Inverted edges can be interpreted as negated edges
Tournament All pairs of nodes are connected by a directed edge


Size n =32
Volume m =496
Loop count l =0
Wedge count s =14,880
Claw count z =143,840
Cross count x =1,006,880
Triangle count t =4,960
Square count q =107,880
4-Tour count T4 =923,552
Maximum degree dmax =31
Maximum outdegree d+max =31
Maximum indegree dmax =29
Average degree d =31.000 0
Fill p =0.500 000
Size of LCC N =32
Size of LSCC Ns =31
Relative size of LSCC Nrs =0.968 750
Diameter δ =1
50-Percentile effective diameter δ0.5 =0.486 038
90-Percentile effective diameter δ0.9 =0.897 208
Median distance δM =1
Mean distance δm =0.972 835
Gini coefficient G =0.000 00
Balanced inequality ratio P =0.468 750
Outdegree balanced inequality ratio P+ =0.356 855
Indegree balanced inequality ratio P =0.362 903
Relative edge distribution entropy Her =1.000 00
Power law exponent γ =Inf
In/outdegree correlation ρ± =−0.807 129
Clustering coefficient c =1.000 00
Directed clustering coefficient c± =0.914 449
Spectral norm α =31.000 0
Operator 2-norm ν =19.601 8
Cyclic eigenvalue π =7.212 63
Algebraic connectivity a =32.000 0
Spectral separation 1[A] / λ2[A]| =31.000 0
Reciprocity y =0.000 00
Non-bipartivity bA =0.967 742
Normalized non-bipartivity bN =0.967 742
Algebraic non-bipartivity χ =30.000 0
Spectral bipartite frustration bK =0.241 935
Controllability C =1
Relative controllability Cr =0.031 250 0


Fruchterman–Reingold graph drawing

Degree distribution

Cumulative degree distribution

Lorenz curve

Spectral distribution of the adjacency matrix

Spectral distribution of the normalized adjacency matrix

Spectral distribution of the Laplacian

Spectral graph drawing based on the adjacency matrix

Spectral graph drawing based on the Laplacian

Spectral graph drawing based on the normalized adjacency matrix

Degree assortativity

Zipf plot

Hop distribution

Double Laplacian graph drawing

Delaunay graph drawing

In/outdegree scatter plot

Clustering coefficient distribution

Average neighbor degree distribution


Matrix decompositions plots



[1] Jérôme Kunegis. KONECT – The Koblenz Network Collection. In Proc. Int. Conf. on World Wide Web Companion, pages 1343–1350, 2013. [ http ]
[2] A. M. Guhl. Social behavior of the domestic fowl. Manhattan, Kansas: Kansas State Coll., Agricultural Experiment Station, Tech. Bull. 73, 1953.