IT 
3. 
III •Terminology. 
As a rule, one term came to be used for each idea in the coiinting, 
but there are many exceptions. Some of the ideas have several terms 
OP variations "on the term evolved throu^ usage or changed intentional- 
ly. 
1. Mixed Flocks. 
A mixed flock is two or more species in an association either in the same 
actual tree or in the same volume composed roughly of a sphere fifty feet 
in diameter., incases where there are no natural foliage breaks. 
2. Nucleus of a Flock. 
An old term, originally used to mean a species which was joined by 
the other species of a given raised flock. Later more definite observ- 
ation changed this term to mean one species joing another to form a 
^ mixed flock when the original species was by itself previously, or 
^en one species joins another species within ten feet. Notation, e.g.: 
" l.Blue j. Plain — a reaction which was summarized in: "nucleus of 
flocks" summaries, "joining" summaries, and "following and/or joingng" 
^ summaries. 
2. Group Leader 
A now completely obsolete term used only when the first bird in a 
flight of a mixed flock was identified. This term is virtually replaced 
by the "following" term or reaction, once the observer becomes proffici^nt 
at rapid identification. Notation, e.g.: 2. Gold. 
3* Following 
When one species actually follows another within thirty seconds in 
flight, wither from tree to tree or from branch to branch in the same 
tree — provided the individuals do not appear aggressive to one another. 
Notation, e.g.: 3. Blue f. Plain. 
4. Not Following 
When one spedies leaves a mixed flock conspiciously , without being fol- 
lowed by any other species. Distinguished from "leaving" by the fact that 
the Bird flies giTing some call notes. Notation, e.g.: 4. Palm. 
5 • Supplant ing 
When one specie;^ takes the perch of, or lands close to and causes the 
