Honey bees foraging on catalpa leaves

There was on post (June 23rd, 2016), I was begging everyone to show me if they saw honey bees foraging on catalpa leaves. No one responded.

On Sunday June 26, I finally had the luck to see honey bees foraging on the back of catalpa leaves. I was going to give up after waiting for 10 min on the blooming tree, but decided to walk to the other tree (finished bloom about one week ago). Then I saw one honey bee foraging! I started shooting the bee (with my camera, of course) and another bee showed up. I went back to the blooming tree (30 ft away) and saw another 2 bees. So there were at least 4-5 honey bees foraging on the catalpa leaves, from 9:15-10 am Sunday morning…

Now, I finally have photos to prove this! (after visiting 6 trees and at least 10 trips!). Will try to keep an eye how long honey bees will forage on the plant. My friend in Canada said he saw more honey bees in July. One paper described nectar production by the leaves and said production peaked in July in Georgia. Apparently trees benefit by attracting ants to the leaves, who in turn would protect the trees from caterpillars (the catalpa worms are good fishing bait, I was told, but I have not seen them yet).

I googled for “catalpa leaf honey bees” and it came up with one single image with 2 bees on a leaf, but both were on the upper side of the leaf, so I do not think they were foraging on the tree. I did not observe bees go to the upper side at all when they were foraging for nectar.  So, enjoy the first few photos of honey bees foraging on catalpa leaves!

  1. A honey bee foraging on the underside of a catalpa leave (Catalpa speciosa, Bignoniaceae). I can see about 6 extrafloral nectaries on this leaf. The bee is on the 5th one, counting form the top. The nectar would lighten up the leave.

2. But it can be tricky to count. For the above one I only counted one per main branch (except the basal one, there are always 2). But you can see where the glands are by their slightly different color here, the bee is stepping on one (under the left wing), so there also two here. The one at the lower location only had one on the left.

3. A honey bee licking nectar off the extrafloral nectary on the left side. You can see a wet spot on the right side also.

Other plants with extrafloral nectaries: cotton, cherry (all cherries have 2 glands at the base of each leave, this is how I differentiate a cherry tree from a peach or plum), Roselle (Hibiscus sabdariffa) (I have photos of bees foraging on them).

6 thoughts on “Honey bees foraging on catalpa leaves

  1. Micah

    We have numerous catalpa trees at our house. We also our beekeepers. In the summer the catalpa trees are roaring from the bees working the bottom of the leaves on the extra floral nectarines. (: it is amazing.

  2. Melody

    Maybe Jostaberry? I hit this page when I searched for a bee sucking on the underside of a leaf – I swear it looked just like a bee, but I couldn’t believe it.

  3. Chad McKenzie

    I just saw honey bees all over the bottom of our catalpa tree,googled it to see what it was they were after ? Got here,figured I’d leave a comment. July 20 or so? North central ohio

  4. Larry

    I put in a Catalpa tree three weeks ago and it is loaded with bees. Will they harm the leaves?
    I put another Catalpa tree in about six weeks ago and it has no bees at all. I wondered if one is a male species tree and one a female, if there is such a thing.

  5. Linda R.

    Do grapefruit trees have extra floral nectaries? Was searching to find out why there are beed foraging on the leaves of my two grapefruit trees even though they are not blooming right now, and I came across this post.

  6. Zachary Huang Post author

    I am not aware that grape vines have extrafloral nectatries. Most likely aphids or plant hoppers who secrets honey dew.

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