1 | citizen science | 33 | citizen science | 148 | citizen science | 386 |
2 | north American breeding bird survey | 23 | monitoring | 21 | crowdsourcing | 54 |
3 | breeding bird survey | 16 | climate change | 17 | biodiversity | 34 |
4 | monitoring | 13 | north American breeding bird survey | 14 | climate change | 33 |
5 | volunteer monitoring | 12 | invasive species | 13 | conservation | 28 |
6 | community-based monitoring | 11 | crowdsourcing | 13 | monitoring | 27 |
7 | biodiversity | 9 | data quality | 13 | phenology | 21 |
8 | birds | 8 | conservation | 12 | invasive species | 18 |
9 | conservation | 8 | biodiversity | 12 | distribution | 18 |
10 | species richness | 7 | community-based monitoring | 10 | ebird | 17 |
11 | surveys | 6 | birds | 10 | species distribution models | 17 |
12 | population trends | 6 | guideline | 9 | community-based monitoring | 16 |
13 | common birds census | 5 | education | 8 | public participation in scientific research | 13 |
14 | trends | 5 | phenology | 7 | volunteered geographic information | 13 |
15 | locally-based monitoring | 5 | lepidoptera | 7 | north American breeding bird survey | 13 |
16 | invasive species | 4 | distribution | 7 | remote sensing | 13 |
17 | landscape | 4 | surveys | 6 | big data | 13 |
18 | abundance | 4 | volunteers | 6 | participation | 12 |
19 | sustainability | 4 | meta-analysis | 6 | migration | 12 |
20 | participatory monitoring | 4 | participatory sensing | 6 | data quality | 12 |