| Birds | April 28 | May 4 | May 12 | May 19 | May 26 | June 2 |
| American Robin | 76% | 53% | 55% | 56% | 48% | 54% |
| American Crow | 72% | 71% | 76% | 76% | 71% | 82% |
| Black-capped Chickadee | 66% | 67% | 65% | 64% | 64% | 74% |
| Anna’s Hummingbird | 62% | 73% | 71% | 71% | 76% | 78% |
| Dark-eyed Junco | 56% | 57% | 54% | 58% | 62% | 55% |
| Song Sparrow | 53% | 60% | 68% | 60% | 69% | 63% |
| California Scrub Jay | 49% | 42% | 42% | 45% | 34% | 41% |
| House Finch | 46% | 55% | 55% | 56% | 56% | 61% |
| Spotted Towhee | 44% | 35% | 52% | 48% | 49% | 50% |
| Steller’s Jay | 40% | 40% | 37% | 39% | 46% | 40% |
| Bushtit | 37% | 34% | 27% | 24% | 25% | 23% |
| Mourning Dove | 30% | 20% | 25% | 26% | 22% | 7% |
| Lesser Goldfinch | 30% | 43% | 40% | 41% | 42% | 50% |
| Downy Woodpecker | 29% | 24% | 27% | 36% | 18% | 28% |
| American Goldfinch | 29% | 38% | 24% | 27% | 32% | 29% |
| European Starling | 26% | 30% | 34% | 33% | 25% | 37% |
| Red-breasted Nuthatch | 25% | 26% | 26% | 25% | 26% | 38% |
| Bewick’s Wren | 22% | 15% | 17% | 22% | 15% | 14% |
| House Sparrow | 22% | 23% | 21% | 19% | 21% | 20% |
| Rufous Hummingbird | 21% | 32% | 14% | 19% | 16% | 16% |
| Yellow-rumped Warbler | 20% | 6% | 1% | 1% | 0% | 1% |
| Mallard | 18% | 12% | 12% | 13% | 7% | 9% |
| White-crowned Sparrow | 16% | 14% | 13% | 9% | 11% | 7% |
| Red-tailed Hawk | 15% | 7% | 5% | 7% | 6% | 8% |
| Canada Goose | 15% | 10% | 5% | 11% | 5% | 3% |
| Pine Siskin | 13% | 14% | 5% | 7% | 10% | 7% |
| Vaux Swift | 12% | 15% | 13% | 12% | 9% | 11% |
| Red-breasted Sapsucker | 10% | 5% | 7% | 3% | 6% | 9% |
| Hairy Woodpecker | 8% | 9% | 8% | 7% | 8% | 4% |
| Band-tailed Pigeon | 8% | 6% | 6% | 5% | 7% | 6% |
| Great Blue Heron | 8% | 4% | 3% | 9% | 2% | 7% |
| Black-headed Grosbeak | 7% | 6% | 24% | 22% | 23% | 21% |
| Ruby-crowned Kinglet | 7% | 3% | 2% | 0% | 1% | 0% |
| Northern Flicker | 6% | 20% | 8% | 15% | 25% | 37% |
| Tree Swallow | 6% | 4% | 6% | 5% | 7% | 8% |
| Cooper’s Hawk | 5% | 5% | 2% | 4% | 2% | 5% |
| Brown Creeper | 5% | 4% | 3% | 3% | 0% | 1% |
| Pileated Woodpecker | 5% | 4% | 25% | 2% | 6% | 1% |
| Violet-green Swallow | 4% | 3% | 5% | 5% | 7% | 5% |
| Wilson’s Warbler | 4% | 9% | 4% | 1% | 3% | 1% |
| Orange-crowned Warbler | 4% | 6% | 2% | 1% | 2% | 0% |
| Raven | 4% | 3% | 5% | 5% | 6% | 3% |
| Western Tanager | 3% | 2% | 10% | 7% | 7% | 3% |
| Barred Owl | 3% | 2% | 2% | 4% | 2% | 2% |
| Barn Swallow | 2% | 2% | 1% | 6% | 2% | 2% |
| Golden Crowned Sparrow | 2% | 1% | 1% | 0% | 0% | 0% |
| Black-throated Gray Warbler | 2% | 2% | 1% | 2% | 2% | 1% |
| Sharp-shinned Hawk | 1% | 2% | 1% | 4% | 1% | 1% |
| Chestnut-backed Chickadee | 1% | 3% | 2% | 7% | 18% | 23% |
| Western Screech Owl | <1% | 0% | 0% | 1% | 0% | 2% |
| Green Heron | <1% | 0% | 0% | 1% | 0% | 0% |
| Peacock | <1% | 0% | 1% | 0% | 0% | 0% |
| Bald Eagle | <1% | <1% | 1% | 2% | 1% | 3% |
| Belted Kingfisher | <1% | <1% | 1% | 0% | 0% | 1% |
| Eurasian Collared Dove | <1% | <1% | 1% | 1% | 7% | 8% |
| Turkey Vulture | <1% | 2% | 1% | 3% | 0% | 0% |
| White-breasted Nuthatch | <1% | <1% | 1% | 3% | 4% | 7% |
| Red-winged Blackbird | <1% | <1% | 1% | 2% | 3% | 5% |
| Purple Finch | <1% | <1% | 1% | 2% | 5% | 5% |
| Hermit Thrush | <1% | 0% | 0% | 0% | 0% | 0% |
| Ring-necked Pheasant | – | <1% | 1% | 0% | 0% | 0% |
| Rock Dove | – | – | – | – | 3% | 3% |
| Cedar Waxwing | – | – | – | – | 9% | 3% |
Also seen week of May 4: Turkey Vulture, Rock Dove, Purple Finch, Warbling Vireo, Cowbird, American Kestrel, Wood Duck, Red-breasted Nuthatch, Chestnut-backed Chickadee, Winter Wren, Osprey, White Pelican
Also seen the week of May 12: Northern Oriole, Great Horned Owl, Wood Ducks, Chipping Sparrow, Rock Dove, Brown-headed Cowbird, Evening Grosbeak, Black Chinned Hummingbird
Also seen week of May 19: Cowbird, Mountain Chickadee, Pacific Wren , Red-winged Blackbird, Mountain Chickadee, Brewer’s Blackbird, Swainson’s Thrush, Wood Duck, Killdeer, Cedar Waxwing, Osprey
Also seen week of May 26: Cedar Waxwing, Bullock’s Oriole, House Wren, Varied Thrush. Willow Flycatcher, Common Yellowthroat, Hermit Thrush, Fox Sparrow, Swainsons Thrush
Also seen week of June 2: Varied Thrush, Brown Headed Cowbird, Willow Flycatcher, Osprey, Fox Sparrow
| Mammals | April 28 | May 4 | May 12 | May 19 | May 26 | June 2 |
| Eastern Gray Squirrel | 39% | 50% | 53% | 66% | 58% | 62% |
| Free-roaming Cat | 23% | 29% | 21% | 26% | 25% | 32% |
| Fox Squirrel | 23% | 25% | 29% | 28% | 22% | 25% |
| Douglas Squirrel | 15% | 20% | 24% | 25% | 22% | 26% |
| Bat Species | 5% | 4% | 2% | 5% | 2% | 1% |
| Raccoon | 3% | 5% | 8% | 11% | 8% | 11% |
| Coyote | 3% | 1% | 2% | 3% | 1% | 1% |
| Opossum | <1% | 2% | 3% | 3% | 2% | 2% |
| Red Fox | <1% | 0% | 0% | 0% | 0% | 0% |
| Beaver | <0% | 0% | 1% | 1% | 0% | 0% |
| River Otter | 0% | 0% | 0% | 1% | 0% | 0% |
| Brush / E. Cottontail | — | — | — | 11% | 20% | 17% |
| Black-tailed Deer | — | — | — | 3% | 1% | 1% |
| Townsend’s Chipmunk | — | — | — | 5% | 7% | 3% |
| Striped Skunk | — | — | — | 2% | 0% | 0% |
Also seen on April 28: Brush Rabbit, Chipmunk, Norway Rat, Grey Fox, Nutria, California Ground Squirrel
Also seen on May 4: Townsend’s chipmunk, striped skunk, brush rabbit, eastern cottontail rabbit, mole, deer
Also seen on May 12: Townsend’s Chipmunk, Brush Rabbit
Also seen on May 19: Nutria, Mole
Also seen on May 26: Vole species, dog
Also seen June 2: California Ground Squirrel. Mice species, Vole species, Nutria
| Insects | April 28 | May 4 | May 12 | May 19 | May 26 | June 2 |
| Bumblebee | 46% | 59% | 51% | 60% | 60% | 71% |
| Honey Bee | 37% | 47% | 47% | 51% | 61% | 65% |
| Mason Bee | 23% | 29% | 20% | 15% | 11% | 17% |
| Common Green Darner | 1% | 4% | 2% | 1% | 0% | 8% |
| White Cabbage Moth | — | — | — | — | 14% | 16% |
Other insects observed on May 4: White cabbage moths, earwig, phidippus jumping spider, stinkbug, wasp, lady bugs, box elder bugs, gnats, crane flies, painted lady butterfly, various ant species, various moth species, various butterfly species, various spider species,
Other insects observed on May 12: White Cabbage Moths, Crane Fly, various wasp species, various spider species. Various fly species, various ant species
Other insects observed on May 19: Spider species, Cucumber Beetles, Hoverflies, Water Strider, Sweat Bees, Wasps Syrphid Flies. Ladybugs, Fly Species, Ant Species, White Cabbage Moths, Cranefly
Other species observed on May 25: Spiders, Moths, Flies, Cucumber Beetles
Other species observed on June 2: Damsel Fly. Spiders, Ants, Ladybugs. Dragonflies (Common Whitetail), Hover fly, Sweat Bee, Cutworm Moths, Soldier Beetles, Various Butterfly Species
Reptiles and Amphibians Observed:
Week of May 4: Ensatina Salamander
Week of May 12: Garter Snake
Week of June 2: Garter Snake
Photo of the Week:
Eight-spotted skimmer in NW Portland posted by Mike Houck on the Backyard BioBlitz Facebook page.
Tip of the Week: Keep Cats Safe at Home
For the next couple of weeks there will be lots of young birds fledging (leaving the nest). Birds are particularly vulnerable during this time of year. Many leave the nest before they can fly and can spend up to a week on the ground. It is a particularly important time of year to keep cats safe at home. Predation by cats is the number one cause of intake at Bird Alliance of Oregon’s Wildlife Care Center at this time of year. Bird Alliance of Oregon has partnered with the Feral Cat Coalition of Oregon for many years on a Cat’s Safe at Home Campaign. You can go to our joint website to learn more about ways to keep birds and cats safe around your home: https://www.catssafeathome.org/
To Participate in the Bird Alliance of Oregon Backyard BioBlitz, click here.
To Learn More:
Bird Alliance of Oregon BioBlitz Facebook Group Page: You can post pictures, information or questions about what you are seeing at any time on our Backyard BioBlitz Facebook Group Page. We are also posting information and opportunities to learn more about the region’s wildlife here as well.
Ask a Birder: Every Wednesday from 7-8 pm, Bird Alliance of Oregon experts will be online talking about the birds that are passing through our region and answering questions. Learn more.
Species Shout Out: Short 2 minute presentations on local bird species with Bird Alliance of Oregon naturalist, Greg Smith. This week’s species: Downy Woodpecker.
Need Birdfeeding Supplies? The Bird Alliance of Oregon Nature Store is now online! Everything from feeders to birdseed and suet to guides and optics is available for online purchase and can be either shipped or picked-up curbside.
