611
All nine " Tachycineta " species have glossy blue or green backs and white underparts , but the five species with white rumps & ndash ; the mangrove swallow , Tumbes swallow , white-winged swallow , white-rumped swallow and Chilean swallow & ndash ; are particularly closely related , the first three and the last two forming two superspecies .
 Tumbes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Tumbes