@Ali Khan Azad posted:How can it be a new species when it is found in neighboring countries.
It is like saying that Demerara Guy is new to the scrap iron industry.
Esteemed Ali Khan Azad ... 
By reading the article c-a-r-e-f-u-l-l-y, you will note that it is stated that the of bird is found generally in Brazil, Suriname, and Venezuela
It is the first time that the black-chested tyrantis is found in Guyana.
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New species of bird recorded for the first time in Guyana
By: Amar Persaud
The Belted Kingfisher [Leon Moore photos]
Birding experts Brian O’Shea and Leon Moore have recorded a new species of bird in Guyana during an ongoing study being conducted in Region One (Barima-Waini).
The new recorded species is the black-chested tyrant, which is more commonly found in neighbouring Brazil, Suriname, and Venezuela. It has a chestnut head, a black breast band, and gray underparts. This species has a large range, and does not approach the thresholds for vulnerability.
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