The "Needle" they are sticking into the ground is them laying eggs........they are females.
I would suggest varying the diet. Next trip, get some crickets & Nightcrawlers. Switch between feeding those to the frog. Make sure the worms are dye & chemical free and that you cut appropriate sized bits to offer the frog.
As for feeding the crickets, you need to offer them different foods. They sell a gut-load food for them at the pet stores. Or you can also feed them oats for variety. We prefer feeding dubias over the crickets because they are more nutritious and less likely to be carriers of parasites or disease.

Best of Luck!