There were 5 birds. The red bird flew away, so now there are 4 birds left.<br><br>
Counting from the left, the last remaining bird is the 4th bird from the left (since only 4 birds remain).<br><br>
Check: 5 birds - 1 bird that left = 4 birds. Last position = 4th from left.<br><br>
Final Answer: fourth