Download A Field Guide to Hummingbirds of North America by Sheri Williamson PDF

By Sheri Williamson

Это наиболее детальный определитель колибри, характеризующий 31 североамериканский вид и снабженный 250 цветными фотографиями и 33 картами. Во вводной главе изложена естественная история колибри, способы их привлечения и кормления, а также места в США и Канаде, наиболее удобные для наблюдения колибри. На 31 цветной вкладке приведены иллюстрации 28 видов, 7 гибридных комбинаций, three формы альбиносов и four вида бабочек-бражников, часто принимаемых за колибри. Описание видов включает информацию о песнях и сигналах, шорохе крыльев, сходных видах, поведении, местообитаниях, распространении, систематике, охранном статусе. Для некоторых распространенных мигрирующих видов приведены даты ожидаемого весеннего прилета.
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6. Avoid white-knuckle syndrome—relax and hold the tiller tenderly. A tight fist around the tiller tightens your forearm and puts stress on your upper body, and you end up steering from your shoulder with jerky results, and not comfortably with your wrist. 7. When moving from one side of the boat to the other while steering, always pass in front of the tiller and look forward for better control. This allows you to see your crew and other boats in the vicinity. 8. Before changing course, give your crewmates plenty of warning so that they can position themselves to trim the sails comfortably.

Lulls inhow an activity can be so relaxing yet can require dicate reduced wind velocity and so much attention. I really believe one’s manifest themselves as smoother understanding and awe of nature and our areas on the water. As puffs move and lulls form, you can detect universe is heightened by sailing and wish changes in wind direction and everyone could have this experience. Hearing the strength. ” LEANN SMITH (46), KANSAS CITY, MO 50 Headers and Lifts Sailors talk about true wind and apparent wind.

Airflow on the windward side of the sail is not smooth. Either the jib is eased too much and needs to be trimmed in, or the person steering is pinching—sailing too high and too close to the wind. When the windward telltale is flowing properly and the leeward telltale is fluttering, the jib is trimmed too tight or the person steering is sailing too far off the wind (too low). When steering close-hauled, watch the telltales and keep them in line by moving the tiller slightly until you get the desired results.

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