Animal Behavior Tree Growth
Bars indicate the number of nodes added to the tree each quarter since the establishment of the Academic Family Tree.
Compare to tree:

Animal Behavior Tree Nodes: Quarterly Growth

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Jan 05 Jul 05 Jan 07 Jul 07 Jul 08 Jan 09 Jan 10 Jul 10 Jan 11 Jan 13 Jan 14 Jul 14 Jul 15 Jan 18 Jul 20 Jan 21 Jan 24
Quarter
 Animal Behavior Tree 

Node vs. connection growth
It's also interesting to compare the rate of growth of nodes vs. connections. So far, they've grown at a similar pace, but as the tree is getting larger, the number of new connections seems to be gradually outpacing the number of new nodes.

Animal Behavior Tree: Nodes vs. Connections

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Oct 05 Jul 10 Oct 10 Jan 11 Apr 11 Apr 12 Jan 13 Jan 14 Apr 16 Oct 16 Apr 17 Jan 18 Oct 18 Apr 19 Jul 20 Apr 21 Apr 22 Oct 22 Oct 23 Jan 24 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000
Quarter
 New nodes  New connections 

Daily growth
A bit more detail about what has been happening during the last month.

Animal Behavior Tree: Growth during last 30 days

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21 22 23 24 25 26 27 28 29 30 31 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19
Day
 Animal Behavior Tree