Crows
This reading profile brings together 7 source-linked articles that reference crows.
Explore Fauna’s source-checked field guides and research articles covering crows, or search the species catalog below for individual species profiles.Source-linked reading
- Field guideThe IUCN Red List: categories explainedThe IUCN Red List is the global standard for extinction risk. It sorts each assessed species into one of nine categories — every one a dated, evidence-based verdict in a stated geographic scope.
- Identification guideAmerican crow or common raven?Read the tail shape, the bill, and the voice before deciding which big black bird flew over.
- Field guideBird tracks and toe patternsBird footprints are easiest to read as a trail, not a single stamp. Start with toe geometry, then use webbing, stride, size, and habitat to build a cautious identification.
- Field guideEstimating animal size from a distanceUse a reference in the same plane or a calibrated photogrammetric setup, measure defined landmarks, account for distance and perspective, repeat across suitable frames, and report a range rather than pretending a visual impression is exact.
- Field guideRunning a fixed-point bird countA point count is useful because the observer, place, and clock stay still. Define the protocol before starting, record first detections by sight or sound without double-counting, log conditions, and repeat the same design rather than adjusting it to the day's birds.
- Field guideWatching nests without disturbingA nest is a sensitive place, not a closer-look invitation. The best view usually comes from a settled position with binoculars, a short observation plan, and an immediate retreat when adults change behavior.
- Field guideWhy birds form flocksA flock gives each member more eyes and ears and can transform many local reactions into coordinated group motion. The same crowd also brings competition, disease, conspicuousness, and unequal positions, so birds join, leave, and rearrange flocks as risks and resources change.