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With the distinct downturned bars on segments T2-4 and wholly orange legs, this is a female of Chrysotoxum festivum indeed.
It pays to look at the key https://books.goo...&hl=de, however. It lists the most important characters, starting with the length of the three antennal segments. If I photograph a Chrysotoxum, I always try to get a good shot of the antenna. Then, a lateral shot of the thorax should show if there are yellow spots and how the femora are coloured. One picture is not enough for identification in most cases!
Regards, Sundew