This is the best year I have seen in the past 2 decades for even the most marginal tadpole habitat. Usually there are significant portions of the frog spawning ditches, seasonal ponds etc. that dry up before a large number of tadpoles can fully develop.
Last year was typical. There are some path-side ditches near my home across from a more substantial swampy area. By the second week of June last year these marginal wetlands were drying up. By the end of the third week they were completely dry and many if not most of the tadpoles perished before reaching frog-hood.
This year we have had several rainstorms that dumped a lot of water in the Portland area. When I checked these ditches 2 days ago they had more water in them they they had a week before.
Usually I collect as many tadpoles as I can just before the big “dry-up” and grow them to maturity in a tank outside. When they are ready, they leave. (I use flake fish food to feed them- they don’t eat it but it encourages algae and they eat that.)
This is one year I don’t have to do that. I’ve still collected a few just because I like to watch them grow legs and hop away.
Some of last years pictures. More later.