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[CALBIRDS] Introduced birds in California

See below for information regarding introduced species in California.
Justyn Stahl
San Clemente Island

———- Forwarded message ———
From: Thomas Benson <tbenson@…>
Date: Wed, Nov 27, 2019 at 3:38 PM
Subject: [CALBIRDS] Introduced birds in California
To: calbirds@groups.io <calbirds@groups.io>

Good afternoon and happy early Thanksgiving California birders,

 

Have you ever wondered why some introduced species in California are not on the official state list–even though they have been here for years, have been recorded breeding, or it seems like you see them every time you walk outside your
front door? Well, the California Bird Records Committee (CBRC), who maintains the official California state bird list, has just published on its website an Annotated Watch List of established, naturalized bird species in California:
https://www.californiabirds.org/watchlist.html. This list provides some basic information on populations of naturalized species in the state, as well as their potential for being added to the state
list, and the rationale for that potential. Assuming you actually care or bother to read the list, you may also wonder why species with high potential have not yet been added to the state list. There are two main reasons: 1) the CBRC maintains specific requirements
for adding a population of an introduced species to the state list (see below), and 2) someone has to write a proposal to add the population to the state list, showing that it meets these requirements. This latter responsibility is usually taken up by the
members of the CBRC’s Introduced Birds Subcommittee as time allows, but anyone who wants to may submit a proposal. I hope you have a good holiday weekend, and enjoy some introduced turkey (already on the official state list).

 

Tom

 

Thomas A. Benson

Secretary, California Bird Records Committee

 

 

CBRC Bylaws

VI. Bird Records

B. Records Treated

8. The Committee will also review records of breeding populations of introduced species not on the state list, but only if evidence is submitted that attempts to prove (a) the correct identification of the species and (b) the viability
of the population. To be judged viable, a population must: (i) have bred in the state for fifteen (15) consecutive years, (ii) in general, be increasing or stabilized after an initial period of increase, (iii) be judged to have occupied all geographically
contiguous suitable habitat to such a degree as to sustain the population and be thought unlikely to significantly diminish, and (iv) occupy an environment judged similar enough in ecological factors (e.g., climate, vegetation, food, shelter, competitors,
predators) to the species’ natural habitat, or to other successful introductions, that permanent establishment seems likely.

Source: SanDiegoRegionBirding Latest Reports