fwiw, their explanation is:

https://www.federalregister.gov/articles/2012/07/24/2012-17402/endangered-and-threatened-wildlife-and-plants-listing-foreign-bird-species-in-peru-and-bolivia-as#h-8

"The other comment received from the public was also non-substantive—the commenter asked why these species should be listed under the Act if they are not native to the United States. The Act provides for the listing of any species that qualifies as an endangered or threatened species, regardless of its native range. Protections under the Act apply to species not native to the United States and include restrictions on importation into the United States; sale or offer for sale in foreign commerce; and delivery, receipt, carrying, transport, or shipment in foreign commerce and in the course of a commercial activity. Listing also serves to heighten awareness of the importance of conserving these species among foreign governments, conservation organizations, and the public."

Their other explanation, and it's late for me, but if I read that page correctly, essentially they were petitioned to list these birds and others in 1991 by the International Council for Bird Preservation, and they've been doing half assed things to list them/not list them since until they were finally sued over it in 2008.

So if anyone wants to play partisan games with this most of these actions took place during the reign of Prudent Bush and Minor Bush.

In an era of trillion dollar deficits, one wonders why we waste money on this.

Video.

Ash-breasted tit-tyrant (Anairetes alpinus)

That was my last boss before she stopped smoking.
Pa-Dump-Pump!